JSON Formatter
Format and validate JSON.
Free tool category
Developer Tools
Developer utilities for formatting, minifying, encoding, decoding, and previewing code.
What you can do here
Developer tools keep common technical tasks in one place: JSON formatting, CSS and JavaScript minifying, HTML formatting, regex testing, Base64, URL encoding, JWT decoding, SQL formatting, robots.txt, sitemap, and more.
These tools are organized to help users choose the right page quickly. Working tools are linked directly, while future tools stay visible as category direction without pretending to be active.
Tools in this category
Browse Developer Tools
19 ready tools are linked below. Every listed tool includes a short description so users can understand which page fits their task.
CSS Minifier
Minify CSS for smaller files.
JS Minifier
Minify JavaScript snippets.
HTML Formatter
Format HTML markup.
Regex Tester
Test regular expressions locally.
Base64 Encode Decode
Encode and decode Base64 text.
URL Encode Decode
Encode and decode URL strings.
JWT Decoder
Decode JWT payloads locally without verification.
SQL Formatter
Format SQL queries for readability.
Robots.txt Generator
Create clean robots.txt rules for search crawlers.
Sitemap Generator
Generate simple XML sitemap structures for website URLs.
Open Graph Preview
Preview Open Graph title, description, image, and URL cards.
Unix Timestamp Converter
Convert Unix timestamps to readable dates and dates back to timestamps.
HTML Table Generator
Build clean HTML table markup from rows and columns.
CSS Box Shadow Generator
Create CSS box-shadow values with live preview controls.
CSS Unit Converter
Convert common CSS units such as px, rem, em, percent, vw, and vh.
Media Query Generator
Generate responsive CSS media queries for common breakpoints.
HTML Email Template Previewer
Preview HTML email templates in a browser workspace.
JSON Path Finder
Find paths in JSON data and inspect nested values.
How to choose the right tool
- Start with the category page to compare related tools in one place.
- Read the short description under each tool name before opening a page.
- Open the tool that matches your task and review the on-page instructions.
- For file, image, QR, developer, and calculator tools, keep a copy of important input before relying on final output.