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Developer Tools

Tools for developers and programmers

Found 13 tools

JSON Formatter

Use our JSON formatter online to instantly format, validate, and beautify any JSON data. Paste minified JSON and get perfectly indented output with syntax error detection.

JWT Decoder

Use our JWT decoder online to instantly decode any JWT token. Inspect headers, payloads, and claims safely in your browser with this free JWT token decoder.

Regex Tester

Use our regex tester online to test, debug, and validate regular expressions with live matching. This free regular expression tester helps you build perfect patterns instantly.

SQL Formatter

Use our SQL formatter online to instantly beautify and format any SQL query. This free SQL formatter supports MySQL, PostgreSQL, and more with clean indentation.

Base64 Encoder/Decoder

Use our Base64 decode online tool to instantly decode any Base64 string or encode text to Base64. This free Base64 encoder decoder handles all your conversion needs.

URL Encoder/Decoder

Use our URL encode online tool to instantly encode special characters for safe URLs and query parameters. This free URL encoding tool also decodes percent-encoded strings.

Hash Generator

Use our MD5 hash generator online to instantly create SHA256, SHA1, SHA512, and MD5 hashes. This free hash generator is browser-based and works offline.

Color Converter

Use our HEX to RGB converter online to instantly convert between HEX, RGB, and HSL color codes. This free color code converter is perfect for web designers.

Code Minifier

Use our JavaScript minifier online to instantly minify JS, CSS, and HTML code. This free JS minifier reduces file sizes and speeds up your website.

Diff Checker

Use our diff checker online to instantly compare two texts and find differences. This free text diff tool highlights additions, deletions, and changes side by side.

XML Formatter

Use our XML formatter online to instantly format, beautify, and validate any XML document. This free XML validator catches syntax errors and pretty prints your data.

UUID Generator

Use our UUID generator online to instantly generate random UUID v4 and v1 identifiers. This free GUID generator creates unique IDs for databases and development.

Cron Expression Generator

Use our free cron expression generator to instantly build any cron schedule. Generate cron expressions from plain English, visual selectors, or paste to translate. Standard and Quartz format support.

About

Free Online Tools offers a curated collection of 30+ browser-based utilities plus a blog with practical guides, quick tips, and tool tutorials.

Author: Zohaib Hassan
Role: Full-Stack Web Developer
Expertise: Web development, SEO, and digital tools since 2020

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Built by Zohaib Hassan, a full-stack web developer from Pakistan with expertise in building fast, accessible, and privacy-friendly web applications.

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