Complete Developer Tools Collection
Discover 105 free online developer tools and studio utilities. Most process data locally, while network tools contact servers or external services when required. No registration needed.
Instant Processing
Most tools process data immediately in your browser; network tools make remote requests when needed
Privacy Aware
Local tools keep input on-device; network tools send required request data to servers or external services
Always Available
Access from any device with a modern web browser, no downloads needed
Browse Tools by Category
πText Processing Tools11
π
JSON Formatter
Format and beautify JSON data with syntax highlighting
json
formatter
beautify
+1
π
HTML Formatter
Format HTML with parser-aware embedded CSS and JavaScript handling
html
formatter
beautify
+1
π¨
CSS Formatter
Format or conservatively minify CSS with a syntax-aware parser
css
formatter
beautify
+2
π
Markdown Preview
Preview markdown with live editing
markdown
preview
editor
π
Word Counter
Count words, characters, lines, and paragraphs
word
count
character
+1
π
Case Converter
Convert text between different cases (camelCase, snake_case, etc.)
case
converter
camel
+2
π
Text Diff Checker
Compare two texts and highlight differences
diff
compare
text
β¨
JSON Studio
Complete JSON processing toolkit with formatting, validation, path querying, schema validation, and diff comparison
json
studio
formatter
+4
π
JSON Formatter (Studio)
Format, prettify, and minify JSON with advanced options
json
formatter
prettify
+1
ποΈ
SQL Formatter
Format SQL while preserving quoted strings and identifiers
sql
formatter
database
+1
β
GraphQL Formatter
Format and parse-check GraphQL operations and schemas
graphql
formatter
query
+1
πData Conversion Tools10
β°
Timestamp Converter
Convert exact Unix seconds, milliseconds, microseconds, and nanoseconds with strict RFC 3339 and UTC, local, or IANA timezone handling
timestamp
date
unix
+5
π
Color Converter
Convert HEX, RGB, HSL, HWB, Lab, LCH, OKLab, OKLCH, and Display-P3 colors with alpha and sRGB gamut reporting
color
hex
rgb
+11
π§°
JSON YAML Converter
Convert JSON and YAML in both directions
json
yaml
convert
+1
π§°
CSV JSON Converter
Convert CSV and JSON in both directions
csv
json
convert
+1
π§°
Number Base Converter
Convert binary, octal, decimal, and hexadecimal integers
binary
octal
decimal
+2
π§±
Data and API Studio
Transform JSON into developer-friendly structures and types
json
typescript
flatten
+1
TS
JSON to TypeScript
Infer a TypeScript type from JSON values
json
typescript
types
+1
βοΈ
JSON Flatten and Unflatten
Convert nested JSON to escaped paths and restore it
json
flatten
unflatten
+1
ποΈ
SQL Query Builder
Build SELECT queries with escaped literal values from structured inputs
sql
query
builder
+1
π
Data to SQL Generator
Convert JSON rows into escaped SQL INSERT statements
json
sql
insert
+1
π²Generators Tools8
π
UUID Generator
Generate cryptographic RFC 9562 UUIDv4 and monotonic UUIDv7 batches, or inspect UUID format, version, variant, and v7 timestamp
uuid
uuidv4
uuidv7
+4
π
Password Studio
Comprehensive password generation, analysis, and security toolkit
password
generator
security
+2
οΏ½
Password Generator
Generate secure passwords with customizable options
password
generator
security
οΏ½
Passphrase Generator
Generate secure passphrases using random words
passphrase
generator
security
+1
οΏ½οΈ
Password Analysis
Analyze password strength, entropy, and check for breaches
password
analysis
security
+2
π
Lorem Ipsum Generator
Generate placeholder text in various formats
lorem
ipsum
placeholder
+1
π±
QR Code Generator
Generate QR codes locally in your browser with PNG and SVG downloads
qr
code
generator
+3
π
Fake Data Generator
Generate deterministic seeded JSON records for development and tests
fake
mock
json
+2
β
Validators Tools13
βοΈ
Contrast Checker
Calculate WCAG 2.2 text contrast ratios and AA or AAA threshold results
contrast
accessibility
wcag
+4
ποΈ
Color Blindness Simulator
Preview approximate linear-sRGB matrix simulations for common color-vision deficiencies; intended as a design aid, not a diagnostic
colorblind
accessibility
simulation
+5
βΏ
Accessibility Palette
Generate and review palettes using WCAG 2.2 text contrast, OKLab separation, and approximate color-vision simulation heuristics
colorblind
accessibility
simulation
+7
π
Regex Studio
Comprehensive regex toolkit for testing, replacing, and exploring patterns
regex
regexp
test
+3
π§ͺ
Regex Tester (Studio)
Test regular expressions with real-time matching and highlighting
regex
test
validation
+1
βοΈ
Regex Replace
Find & replace text using regex patterns with preview
regex
replace
find
+2
π
Regex Pattern Library
Browse and use common regex patterns for various use cases
regex
patterns
library
+2
β
JSON Validator
Validate JSON syntax and structure
json
validator
syntax
π‘οΈ
JSON Schema Validator
Validate JSON with Draft 2020-12, local references, formats, and schema generation
json
schema
validator
+1
π§
Email Validator
Check common email syntax and normalize internationalized domains without claiming deliverability
email
syntax
idn
+3
π§°
YAML Validator
Validate YAML and report useful locations
yaml
validate
serialization
π§°
XML Validator
Validate XML structure and syntax
xml
validate
serialization
β
OpenAPI Validator
Validate OpenAPI 3.x metadata, paths, operations, and responses
openapi
swagger
api
+1
πSecurity Tools Tools10
π‘οΈ
Port Scanner
Network port scanner with predefined profiles and custom ranges
port
scanner
security
+2
π‘οΈ
Security and Identity Studio
Inspect tokens and generate cryptographic hashes locally
security
jwt
hash
+1
πͺͺ
JWT Inspector
Decode JWT headers and claims without implying signature verification
jwt
token
claims
+1
#οΈβ£
Hash and HMAC Generator
Generate SHA-2 digests and keyed HMAC values with Web Crypto
hash
hmac
sha-256
+1
β
JWT Signature Verifier
Verify HS, RS, and ES JWT signatures without claiming claim validation
jwt
signature
jwk
+2
π
Authenticated Text Encryption
Encrypt and decrypt text using AES-GCM and PBKDF2 with Web Crypto
aes-gcm
encryption
decrypt
+1
π
Keypair and Signature Tool
Generate ECDSA test keys and sign or verify text locally
ecdsa
keypair
signature
+1
π
Subresource Integrity Generator
Generate SHA-2 Subresource Integrity hashes from exact resource content
sri
integrity
sha-384
+1
β±οΈ
TOTP Generator and Validator
Generate and validate standard time-based one-time passwords locally
totp
2fa
otp
+1
π
X.509 Certificate Decoder
Decode X.509 certificate fields locally without claiming chain trust
x509
certificate
pem
+2
πWeb Development Tools15
π¨
Color Studio
CSS Color 4 toolkit for conversion and gamut mapping, OKLCH palettes, perceptual gradients, WCAG 2.2 contrast, and approximate color-vision previews
color
hex
rgb
+17
π―
Color Picker
Edit colors with RGB, HSL, HSV, CMYK, and OKLCH controls, CSS Color 4 input, alpha, and sRGB gamut mapping
color
picker
interactive
+8
π¨
Palette Generator
Generate traditional color harmonies or perceptually ordered OKLCH tones from a base color
color
palette
harmony
+6
π
Gradient Creator
Create linear, radial, and conic CSS gradients using sRGB, linear-sRGB, OKLab, or OKLCH interpolation with portable sampled-stop export
gradient
css
linear
+8
π±
Icon Pack Generator
Generate professional icon packs for Android and iOS from high-quality images
icon
android
ios
+4
π¨
Gradient Color Picker
Sample alpha-aware custom gradients using sRGB, linear-sRGB, OKLab, or OKLCH interpolation and selectable OKLCH hue paths
gradient
color
picker
+8
π
Web Development Studio
Format source and generate common web development assets locally
javascript
typescript
svg
+3
JS
JavaScript and TypeScript Formatter
Format JavaScript and TypeScript with a parser-backed engine
javascript
typescript
prettier
+1
πΌοΈ
SVG Data URI Converter
Convert safe SVG markup and percent-encoded or Base64 data URIs
svg
data-uri
base64
+1
π
CSS Unit Converter
Convert CSS lengths with explicit font, parent, and viewport context
css
px
rem
+3
π
CSS Clamp Calculator
Generate fluid CSS clamp expressions from size and viewport bounds
css
clamp
responsive
+1
π
Open Graph Generator
Generate escaped Open Graph and Twitter card meta tags
open-graph
twitter-card
meta
+1
π±
Web Manifest Generator
Generate and validate core web app manifest fields
manifest
pwa
web-app
+1
ποΈ
JavaScript Minifier
Minify modern JavaScript with Terser and exact size reporting
javascript
minify
terser
+1
β¨
SVG Optimizer
Optimize safe SVG markup with SVGO and exact size reporting
svg
optimize
svgo
+1
π§ͺAPI & Testing Tools13
π
Network Studio
Comprehensive network testing and analysis toolkit with 10 professional tools
network
testing
analysis
+2
π
API Tester
Browser-based REST request builder with cURL import/export; target CORS policies apply
api
rest
testing
+2
π‘
HTTP Client
Browser-based HTTP request builder and response viewer; target CORS policies apply
http
client
requests
+1
π»
WebSocket Tester
Run a bounded server-side WebSocket handshake and measure its latency
websocket
realtime
testing
+1
π©Ί
Website Diagnostics Studio
Inspect public website redirects, headers, metadata, and DNS configuration with bounded serverless checks
website
diagnostics
http
+2
βͺοΈ
Redirect Tracer
Follow and report a bounded, SSRF-protected HTTP redirect chain
redirect
http
url
+2
π‘οΈ
Security Header Analyzer
Inspect public response security headers and configuration gaps
security
headers
csp
+2
π
CORS Analyzer
Probe and explain the CORS policy returned by a public endpoint
cors
preflight
http
+2
π€
Robots.txt Inspector
Fetch and parse a bounded public robots.txt document
robots
seo
crawler
+2
πΊοΈ
Sitemap Validator
Validate one bounded public XML sitemap and list its locations
sitemap
xml
seo
+2
ποΈ
Open Graph Inspector
Extract Open Graph, Twitter Card, and page metadata from bounded HTML
open graph
metadata
social
+2
π§
Email DNS Analyzer
Inspect public MX, SPF, and DMARC records for a domain
dns
email
mx
+2
π‘
DNS Propagation Checker
Compare a public DNS record across three bounded DNS-over-HTTPS resolvers
dns
propagation
doh
+2
π οΈUtilities Tools16
π―
Random Wheel
Spin a wheel to randomly select from your list of options
random
wheel
picker
+2
π
DNS Lookup
Server-side DNS record lookup and domain validation
dns
lookup
domain
+1
π
IP Information
Get detailed IP address information including geolocation and ISP
ip
geolocation
isp
+1
π
Network Monitor
Monitor network performance with ping tests and speed analysis
network
monitor
ping
+2
π
URL Tester
Test URL accessibility and analyze response headers
url
testing
headers
+2
β
On Air Checker
Check if websites and services are online and accessible
online
checker
availability
+2
π
File Link Checker
Check file links and get file information without downloading
file
link
checker
+2
π οΈ
DevOps and Configuration Studio
Build and inspect common DevOps configuration values locally
devops
configuration
cron
+3
β±οΈ
Cron Expression Builder
Build, parse, explain, and preview five-field cron schedules
cron
schedule
devops
π
Chmod Calculator
Convert symbolic and numeric Unix file permissions
chmod
permissions
unix
βοΈ
.env File Manager
Parse, compare, and safely redact environment files
env
configuration
secrets
+1
π’
Semantic Version Comparator
Compare semantic versions and evaluate npm-style ranges
semver
version
range
+1
π³
Dockerfile Linter
Lint Dockerfiles for structural, security, and reproducibility issues
dockerfile
docker
container
+1
π¦
Docker Compose Validator
Validate Compose YAML services and common field structures
docker
compose
yaml
+1
βΈοΈ
Kubernetes Manifest Validator
Validate required fields across multi-document Kubernetes YAML
kubernetes
k8s
yaml
+1
π
.gitignore Generator
Generate de-duplicated gitignore files from technology and editor presets
gitignore
git
generator
+1
πData Analysis Tools5
π
JSONPath Query
Query JSON with RFC 9535 child, wildcard, descendant, union, index, slice, and basic comparison or logical filter expressions
json
path
query
+5
π
JSON Diff Compare
Compare JSON values and generate verified, applicable RFC 6902 patches
json
diff
compare
+2
π
CSV Viewer
Upload and view CSV files with interactive table features
csv
table
data
+1
ποΈ
JSON Table Viewer
Convert JSON data to interactive table with filtering and sorting
json
table
data
+1
π
Data Explorer
Advanced data analysis with statistics, filtering, and visualization
data
analysis
statistics
+1
πEncoding & Decoding Tools7
π€
Base64 Encoder/Decoder
Encode UTF-8 text or binary files as Base64/Base64url and decode with strict or forgiving validation
base64
base64url
binary
+3
π
URL Encoder/Decoder
Encode and decode URLs
url
encode
decode
π·οΈ
HTML Entities
Encode and decode HTML entities
html
entities
encode
+1
π§°
Encoding and Serialization Studio
Format, validate, and convert structured serialization formats
yaml
xml
toml
+3
π§°
YAML Formatter
Format YAML with configurable indentation
yaml
format
serialization
π§°
XML Formatter
Format and normalize XML
xml
format
serialization
π§°
TOML Formatter
Parse, validate, and format TOML
toml
format
serialization
πFile Processing Tools9
π
File Processing Studio
Complete file processing toolkit with 8 specialized tools for image editing, document management, and file organization
file processing
image resizer
pdf tools
+8
πΌοΈ
Image Resizer
Resize images with quality control and format conversion
image
resize
quality
+3
π
PDF Tools
PDF merge, split, rotate, and conversion tools
pdf
merge
split
+3
π
File Converter
Convert JPEG, PNG, and WebP images or switch between plain text and JSON locally
convert
format
jpeg
+4
π¦
Archive Manager
Inspect, extract, and create ZIP archives locally in your browser
archive
zip
extract
+1
π
File Hasher
Generate and verify file checksums using MD5, SHA-1, SHA-256, and SHA-512
hash
checksum
md5
+4
π
Metadata Viewer
View basic file facts, image dimensions, and browser-readable audio or video properties
metadata
properties
dimensions
+3
π
Duplicate Finder
Find and remove duplicate files by comparing file hashes
duplicate
find
remove
+3
π
File Organizer
Organize files by type, date, size, or custom rules with preview and batch operations
organize
sort
type
+4
All Tools
π
JSON Formatter
Format and beautify JSON data with syntax highlighting
json
formatter
π
HTML Formatter
Format HTML with parser-aware embedded CSS and JavaScript handling
html
formatter
π¨
CSS Formatter
Format or conservatively minify CSS with a syntax-aware parser
css
formatter
π
Markdown Preview
Preview markdown with live editing
markdown
preview
π
Word Counter
Count words, characters, lines, and paragraphs
word
count
π
Case Converter
Convert text between different cases (camelCase, snake_case, etc.)
case
converter
π
Text Diff Checker
Compare two texts and highlight differences
diff
compare
π€
Base64 Encoder/Decoder
Encode UTF-8 text or binary files as Base64/Base64url and decode with strict or forgiving validation
base64
base64url
π
URL Encoder/Decoder
Encode and decode URLs
url
encode
π·οΈ
HTML Entities
Encode and decode HTML entities
html
entities
π
UUID Generator
Generate cryptographic RFC 9562 UUIDv4 and monotonic UUIDv7 batches, or inspect UUID format, version, variant, and v7 timestamp
uuid
uuidv4
π
Password Studio
Comprehensive password generation, analysis, and security toolkit
password
generator
οΏ½
Password Generator
Generate secure passwords with customizable options
password
generator
οΏ½
Passphrase Generator
Generate secure passphrases using random words
passphrase
generator
οΏ½οΈ
Password Analysis
Analyze password strength, entropy, and check for breaches
password
analysis
π
Lorem Ipsum Generator
Generate placeholder text in various formats
lorem
ipsum
π±
QR Code Generator
Generate QR codes locally in your browser with PNG and SVG downloads
qr
code
β°
Timestamp Converter
Convert exact Unix seconds, milliseconds, microseconds, and nanoseconds with strict RFC 3339 and UTC, local, or IANA timezone handling
timestamp
date
π¨
Color Studio
CSS Color 4 toolkit for conversion and gamut mapping, OKLCH palettes, perceptual gradients, WCAG 2.2 contrast, and approximate color-vision previews
color
hex
π
Color Converter
Convert HEX, RGB, HSL, HWB, Lab, LCH, OKLab, OKLCH, and Display-P3 colors with alpha and sRGB gamut reporting
color
hex
π―
Color Picker
Edit colors with RGB, HSL, HSV, CMYK, and OKLCH controls, CSS Color 4 input, alpha, and sRGB gamut mapping
color
picker
π¨
Palette Generator
Generate traditional color harmonies or perceptually ordered OKLCH tones from a base color
color
palette
π
Gradient Creator
Create linear, radial, and conic CSS gradients using sRGB, linear-sRGB, OKLab, or OKLCH interpolation with portable sampled-stop export
gradient
css
π±
Icon Pack Generator
Generate professional icon packs for Android and iOS from high-quality images
icon
android
βοΈ
Contrast Checker
Calculate WCAG 2.2 text contrast ratios and AA or AAA threshold results
contrast
accessibility
ποΈ
Color Blindness Simulator
Preview approximate linear-sRGB matrix simulations for common color-vision deficiencies; intended as a design aid, not a diagnostic
colorblind
accessibility
βΏ
Accessibility Palette
Generate and review palettes using WCAG 2.2 text contrast, OKLab separation, and approximate color-vision simulation heuristics
colorblind
accessibility
π¨
Gradient Color Picker
Sample alpha-aware custom gradients using sRGB, linear-sRGB, OKLab, or OKLCH interpolation and selectable OKLCH hue paths
gradient
color
π
Regex Studio
Comprehensive regex toolkit for testing, replacing, and exploring patterns
regex
regexp
π§ͺ
Regex Tester (Studio)
Test regular expressions with real-time matching and highlighting
regex
test
βοΈ
Regex Replace
Find & replace text using regex patterns with preview
regex
replace
π
Regex Pattern Library
Browse and use common regex patterns for various use cases
regex
patterns
β
JSON Validator
Validate JSON syntax and structure
json
validator
β¨
JSON Studio
Complete JSON processing toolkit with formatting, validation, path querying, schema validation, and diff comparison
json
studio
π
JSON Formatter (Studio)
Format, prettify, and minify JSON with advanced options
json
formatter
π
JSONPath Query
Query JSON with RFC 9535 child, wildcard, descendant, union, index, slice, and basic comparison or logical filter expressions
json
path
π‘οΈ
JSON Schema Validator
Validate JSON with Draft 2020-12, local references, formats, and schema generation
json
schema
π
JSON Diff Compare
Compare JSON values and generate verified, applicable RFC 6902 patches
json
diff
π§
Email Validator
Check common email syntax and normalize internationalized domains without claiming deliverability
email
syntax
π
CSV Viewer
Upload and view CSV files with interactive table features
csv
table
ποΈ
JSON Table Viewer
Convert JSON data to interactive table with filtering and sorting
json
table
π
Data Explorer
Advanced data analysis with statistics, filtering, and visualization
data
analysis
π―
Random Wheel
Spin a wheel to randomly select from your list of options
random
wheel
π
Network Studio
Comprehensive network testing and analysis toolkit with 10 professional tools
network
testing
π
API Tester
Browser-based REST request builder with cURL import/export; target CORS policies apply
api
rest
π‘
HTTP Client
Browser-based HTTP request builder and response viewer; target CORS policies apply
http
client
π»
WebSocket Tester
Run a bounded server-side WebSocket handshake and measure its latency
websocket
realtime
π
DNS Lookup
Server-side DNS record lookup and domain validation
dns
lookup
π
IP Information
Get detailed IP address information including geolocation and ISP
ip
geolocation
π‘οΈ
Port Scanner
Network port scanner with predefined profiles and custom ranges
port
scanner
π
Network Monitor
Monitor network performance with ping tests and speed analysis
network
monitor
π
URL Tester
Test URL accessibility and analyze response headers
url
testing
β
On Air Checker
Check if websites and services are online and accessible
online
checker
π
File Link Checker
Check file links and get file information without downloading
file
link
π©Ί
Website Diagnostics Studio
Inspect public website redirects, headers, metadata, and DNS configuration with bounded serverless checks
website
diagnostics
βͺοΈ
Redirect Tracer
Follow and report a bounded, SSRF-protected HTTP redirect chain
redirect
http
π‘οΈ
Security Header Analyzer
Inspect public response security headers and configuration gaps
security
headers
π
CORS Analyzer
Probe and explain the CORS policy returned by a public endpoint
cors
preflight
π€
Robots.txt Inspector
Fetch and parse a bounded public robots.txt document
robots
seo
πΊοΈ
Sitemap Validator
Validate one bounded public XML sitemap and list its locations
sitemap
xml
ποΈ
Open Graph Inspector
Extract Open Graph, Twitter Card, and page metadata from bounded HTML
open graph
metadata
π§
Email DNS Analyzer
Inspect public MX, SPF, and DMARC records for a domain
dns
email
π‘
DNS Propagation Checker
Compare a public DNS record across three bounded DNS-over-HTTPS resolvers
dns
propagation
π
File Processing Studio
Complete file processing toolkit with 8 specialized tools for image editing, document management, and file organization
file processing
image resizer
πΌοΈ
Image Resizer
Resize images with quality control and format conversion
image
resize
π
PDF Tools
PDF merge, split, rotate, and conversion tools
pdf
merge
π
File Converter
Convert JPEG, PNG, and WebP images or switch between plain text and JSON locally
convert
format
π¦
Archive Manager
Inspect, extract, and create ZIP archives locally in your browser
archive
zip
π
File Hasher
Generate and verify file checksums using MD5, SHA-1, SHA-256, and SHA-512
hash
checksum
π
Metadata Viewer
View basic file facts, image dimensions, and browser-readable audio or video properties
metadata
properties
π
Duplicate Finder
Find and remove duplicate files by comparing file hashes
duplicate
find
π
File Organizer
Organize files by type, date, size, or custom rules with preview and batch operations
organize
sort
π§°
Encoding and Serialization Studio
Format, validate, and convert structured serialization formats
yaml
xml
π§°
YAML Formatter
Format YAML with configurable indentation
yaml
format
π§°
YAML Validator
Validate YAML and report useful locations
yaml
validate
π§°
XML Formatter
Format and normalize XML
xml
format
π§°
XML Validator
Validate XML structure and syntax
xml
validate
π§°
TOML Formatter
Parse, validate, and format TOML
toml
format
π§°
JSON YAML Converter
Convert JSON and YAML in both directions
json
yaml
π§°
CSV JSON Converter
Convert CSV and JSON in both directions
csv
json
π§°
Number Base Converter
Convert binary, octal, decimal, and hexadecimal integers
binary
octal
π οΈ
DevOps and Configuration Studio
Build and inspect common DevOps configuration values locally
devops
configuration
β±οΈ
Cron Expression Builder
Build, parse, explain, and preview five-field cron schedules
cron
schedule
π
Chmod Calculator
Convert symbolic and numeric Unix file permissions
chmod
permissions
βοΈ
.env File Manager
Parse, compare, and safely redact environment files
env
configuration
π’
Semantic Version Comparator
Compare semantic versions and evaluate npm-style ranges
semver
version
π³
Dockerfile Linter
Lint Dockerfiles for structural, security, and reproducibility issues
dockerfile
docker
π¦
Docker Compose Validator
Validate Compose YAML services and common field structures
docker
compose
βΈοΈ
Kubernetes Manifest Validator
Validate required fields across multi-document Kubernetes YAML
kubernetes
k8s
π
.gitignore Generator
Generate de-duplicated gitignore files from technology and editor presets
gitignore
git
π§±
Data and API Studio
Transform JSON into developer-friendly structures and types
json
typescript
TS
JSON to TypeScript
Infer a TypeScript type from JSON values
json
typescript
βοΈ
JSON Flatten and Unflatten
Convert nested JSON to escaped paths and restore it
json
flatten
ποΈ
SQL Formatter
Format SQL while preserving quoted strings and identifiers
sql
formatter
ποΈ
SQL Query Builder
Build SELECT queries with escaped literal values from structured inputs
sql
query
π
Data to SQL Generator
Convert JSON rows into escaped SQL INSERT statements
json
sql
β
OpenAPI Validator
Validate OpenAPI 3.x metadata, paths, operations, and responses
openapi
swagger
β
GraphQL Formatter
Format and parse-check GraphQL operations and schemas
graphql
formatter
π
Fake Data Generator
Generate deterministic seeded JSON records for development and tests
fake
mock
π‘οΈ
Security and Identity Studio
Inspect tokens and generate cryptographic hashes locally
security
jwt
πͺͺ
JWT Inspector
Decode JWT headers and claims without implying signature verification
jwt
token
#οΈβ£
Hash and HMAC Generator
Generate SHA-2 digests and keyed HMAC values with Web Crypto
hash
hmac
β
JWT Signature Verifier
Verify HS, RS, and ES JWT signatures without claiming claim validation
jwt
signature
π
Authenticated Text Encryption
Encrypt and decrypt text using AES-GCM and PBKDF2 with Web Crypto
aes-gcm
encryption
π
Keypair and Signature Tool
Generate ECDSA test keys and sign or verify text locally
ecdsa
keypair
π
Subresource Integrity Generator
Generate SHA-2 Subresource Integrity hashes from exact resource content
sri
integrity
β±οΈ
TOTP Generator and Validator
Generate and validate standard time-based one-time passwords locally
totp
2fa
π
X.509 Certificate Decoder
Decode X.509 certificate fields locally without claiming chain trust
x509
certificate
π
Web Development Studio
Format source and generate common web development assets locally
javascript
typescript
JS
JavaScript and TypeScript Formatter
Format JavaScript and TypeScript with a parser-backed engine
javascript
typescript
πΌοΈ
SVG Data URI Converter
Convert safe SVG markup and percent-encoded or Base64 data URIs
svg
data-uri
π
CSS Unit Converter
Convert CSS lengths with explicit font, parent, and viewport context
css
px
π
CSS Clamp Calculator
Generate fluid CSS clamp expressions from size and viewport bounds
css
clamp
π
Open Graph Generator
Generate escaped Open Graph and Twitter card meta tags
open-graph
twitter-card
π±
Web Manifest Generator
Generate and validate core web app manifest fields
manifest
pwa
ποΈ
JavaScript Minifier
Minify modern JavaScript with Terser and exact size reporting
javascript
minify
β¨
SVG Optimizer
Optimize safe SVG markup with SVGO and exact size reporting
svg
optimize
Why Choose DevTool Platform?
π Fast & Efficient
Most tools run locally in your browser using modern web technologies. Network utilities make remote requests because their results depend on servers or external services.
π Privacy First
Local formatters and converters keep input on your device. Network diagnostics and breach checks send only the request data needed to provide their results.
π― Completely Free
No hidden costs, premium features, or subscription fees. All tools are completely free to use with no limitations.
π± Mobile Friendly
Responsive design that works perfectly on phones, tablets, and desktop computers. Access your tools from anywhere.