Developer tools for everyday work

Developer tools for everyday work

115 tools
JSON formatter and validator
JSON minifier
Base64 string encoder and decoder
JWT parser
Text hash generator
Regular expression tester
Date and timestamp converter
URL parser
XML formatter and validator
Basic Auth header generator
HMAC generator
chmod permissions calculator
IPv4 address converter
JSON to CSV converter
JSON to XML converter
XML to JSON converter
Markdown to HTML converter
Integer base converter
Keyboard keycode info
Device information
User agent parser
HTTP status codes
MIME type lookup
Base64 File Converter
JSON diff
JSON, YAML and TOML Converter
TOML Viewer and Validator
Crontab Generator and Explainer
Docker run to Docker Compose converter
ULID Generator
IBAN Validator and Parser
SVG Placeholder Generator
Icon recolor and batch tint
SVG icon font generator
CSS filter playground
Color blindness simulator
Screenshot contrast audit
Browser tab preview generator
Transliteration rules lab
Changelog generator
Release notes builder
Markdown email preview
Media container compatibility checker
Password strength checker
JWT security analyzer
CSP builder and validator
Meta tag generator
CSV Cleaner
SQL formatter
Markdown table generator
Barcode and label sheet generator online
Online 3D model viewer
Full page website screenshot
cURL converter
PWA manifest and favicon audit
HTTP/2, HTTP/3 and ALPN checker
Cache-Control and CDN header audit
HTTP security headers audit
robots.txt and sitemap.xml analyzer
OG/Schema Preview
Image palette extractor
JSON Schema validator and example generator
RSA key pair generator
Text encryption and decryption
OTP TOTP/HOTP generator and validator
MAC address generator
IPv4 range expander
IPv6 ULA generator
Random port generator
Phone parser and formatter
Math evaluator
String obfuscator
Benchmark builder
Function values table calculator
Equation root finder
Derivative and tangent calculator
Integral and area calculator
Modular arithmetic calculator
Prime numbers, divisors and factorization
Number sequence generator
Distance and bearing between coordinates
Classic cipher suite
Text frequency analyzer
Truth table generator
RAID calculator
SVG to CSS and Data URI tools
REALITY TLS scanner
VLESS, VMess, Trojan and Hysteria2 link parser
REALITY SNI candidate tester
Xray and sing-box subscription analyzer
Xray proxy availability monitor
Xray and sing-box config converter
DNSSEC chain checker
SPF generator and validator
URL cleaner and canonicalizer
JSONPath tester
XPath and CSS selector tester
Git patch viewer
Semantic version comparator
.env validator
HTTP headers parser and builder
Secret detector
SRI hash generator
Convert Shapefile, GeoPackage, GeoJSON and KML online
Fix GeoJSON, KML, GPX and TCX topology online
Floor Plan to 3D Model Online
CSV pivot table builder
JSON Schema generator from example
API mock response generator
Repair JSON syntax
Regex from a description
SQL query from a description
Test cases from requirements
Log error explainer
JSON Schema from an example

Developer tools for everyday work

Developer tools collect focused utilities for formatting, parsing, validating, minifying and inspecting technical data. They help with code snippets, API responses, configuration files and browser-related checks.

Format and inspect data

Use these tools to work with JSON, CSS, colors, user agents, keyboard codes, file types and other small pieces of technical information that appear during development and testing.

Quick checks during implementation

The category is useful when you need a fast answer without switching to a large IDE workflow: paste data, run the utility, check the result and continue working.

Choose a developer tool above for small technical operations that should be quick, visible and easy to repeat.