Free Online Developer Tools
Fast, private, client-side tools for developers. No sign-up, no server calls — everything runs in your browser.
JSON Formatter & Validator
Format, beautify, and validate JSON data online. Instant client-side processing with syntax highlighting.
SQL Formatter
Format and beautify SQL queries online. Supports SELECT, INSERT, UPDATE, DELETE and more.
Regex Tester
Test and debug regular expressions in real-time. See matches highlighted instantly with capture groups.
Base64 Encode / Decode
Encode and decode Base64 strings online. Supports text and UTF-8 content.
URL Encode / Decode
Encode and decode URLs and query parameters. Handle special characters safely.
Hash Generator (MD5, SHA1, SHA256)
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text. Uses the Web Crypto API.
UUID Generator
Generate random UUIDs (v4) instantly. Create single or bulk UUIDs for your projects.
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates. Supports seconds and milliseconds.
Color Picker / Hex-RGB Converter
Pick colors and convert between HEX, RGB, and HSL formats. Visual color picker with instant conversion.
Lorem Ipsum Generator
Generate placeholder lorem ipsum text. Choose paragraphs, sentences, or words.
JWT Decoder
Decode and inspect JSON Web Tokens (JWT) online. View header, payload, and check expiration — all client-side.
Markdown Preview
Live Markdown to HTML preview. Type Markdown on the left, see rendered HTML on the right — instant, client-side.
CSS Minifier
Minify CSS code online. Remove whitespace, comments, and unnecessary characters to reduce file size.
HTML Encoder / Decoder
Encode and decode HTML entities online. Convert special characters to HTML entities and back.
JSON to CSV Converter
Convert JSON arrays to CSV format online. Instant client-side conversion with download support.
YAML to JSON Converter
Convert between YAML and JSON formats online. Instant, client-side conversion with no data sent to servers.
Cron Expression Parser
Parse and describe cron expressions in plain English. See the next 5 scheduled run times for any cron job.
Diff Checker
Compare two texts side by side and highlight differences. Find changes between code versions, configs, or any text.
Password Generator
Generate strong, random passwords with configurable length and character sets. Includes a password strength meter.
IP Address Lookup
Find your public IP address and geolocation info. Uses a free API to show IP, city, country, ISP, and more.
HTTP Status Code Reference
Searchable reference of all HTTP status codes with descriptions. Quickly look up what any status code means.
Git Command Generator
Generate git commands for common operations. Select what you want to do and get the exact command to run.
Chmod Calculator
Calculate Unix file permissions with an interactive chmod calculator. Toggle permission bits and get the numeric value.
SVG to PNG Converter
Convert SVG to PNG online. Paste SVG code and download it as a PNG image — all processed in your browser.
Text Case Converter
Convert text between UPPER CASE, lower case, Title Case, camelCase, snake_case, and kebab-case instantly.