Free developer tools online
28 free tools ready to use
Base64 Encoder/Decoder
Encode and decode text or data to Base64 in one click.
Open tool →Base Converter
Convert numbers between binary, decimal, hex, and octal.
Open tool →Color Converter
Convert colors between HEX, RGB, and HSL formats.
Open tool →Cron Expression Generator
Build cron schedule expressions with a visual picker.
Open tool →CSS Formatter
Beautify or minify CSS in your browser — no upload required.
Open tool →Domain Age Checker
Check domain age, registration dates, registrar, DNS records, SSL certificate, and website details.
Open tool →Gitignore Generator
Build a .gitignore file for your tech stack in one click.
Open tool →HTML Entity Encoder
Encode and decode HTML entities safely in your browser.
Open tool →HTML Formatter
Beautify or minify HTML markup for readable code output.
Open tool →HTTP Status Codes
Look up HTTP status code meanings quickly.
Open tool →JavaScript Formatter
Beautify or minify JavaScript code for readable, compact output.
Open tool →JSON Formatter
Format, validate, and minify JSON with readable syntax highlighting.
Open tool →JSON to CSV Converter
Convert JSON arrays to CSV and CSV back to JSON instantly.
Open tool →JSON XML Converter
Convert JSON to XML and XML to JSON instantly.
Open tool →JWT Decoder
Decode JWT tokens safely in your browser — header and payload as JSON.
Open tool →Markdown to HTML
Convert Markdown syntax to clean HTML with live preview.
Open tool →Meta Tag Generator
Generate SEO meta tags, Open Graph, and Twitter Card HTML.
Open tool →Mock Data Generator
Generate fake names, emails, phones, and JSON test datasets.
Open tool →Regex Tester
Test regular expressions live with match highlighting and flags.
Open tool →Site Map Chart Maker
Build an interactive website structure chart from an outline, preview layouts, and download PNG, SVG, JSON, or interactive HTML.
Open tool →SQL Formatter
Beautify SQL queries for readable formatting.
Open tool →String Escape Unescape
Escape and unescape strings for JSON, HTML, URL, and JavaScript.
Open tool →Unix Timestamp Converter
Convert Unix timestamps to dates and back in any timezone.
Open tool →URL Encoder/Decoder
URL-encode or decode strings for safe use in links and APIs.
Open tool →User Agent Parser
Parse browser user-agent strings into browser, OS, and engine.
Open tool →UUID Generator
Generate cryptographically random UUID v4 identifiers in bulk.
Open tool →XML Formatter
Format and minify XML in your browser.
Open tool →YAML JSON Converter
Convert between YAML and JSON (basic YAML subset supported).
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