Top 10 Developer Tools Everyone Should Know About
Bookmark this: All tools listed are available on Supertools for free.
1. JSON Formatter and Validator
Working with APIs means working with JSON. A good formatter turns minified, unreadable JSON blobs into properly indented, syntax-highlighted, collapsible trees. Our JSON Formatter validates structure, detects errors, and lets you copy formatted output with one click. Essential for debugging API responses, reading config files, and reviewing data exports.
2. Regex Tester
Regular expressions are powerful but notoriously hard to write and debug. A regex tester lets you write patterns, test them against sample text, and see real-time matches. Our Regex Tester supports JavaScript, Python, and PCRE flavors with match highlighting and explanation of what each part of the pattern does.
3. Base64 Encoder/Decoder
Base64 encoding is used everywhere — data URIs, email attachments, JWT tokens, API authentication headers. A quick Base64 encoder/decoder saves you from opening a terminal or writing throwaway scripts. Paste text, get encoded output, decode it back — all in your browser.
4. JWT Decoder
JSON Web Tokens carry authentication data in a compact, URL-safe format. When debugging auth issues, you need to see what's inside a token. Our JWT Decoder splits the header, payload, and signature, decodes the Base64 content, and displays the claims — no need to paste tokens into random websites that might log them.
5. SQL Formatter
Unformatted SQL is painful to read. A SQL formatter adds proper indentation, capitalizes keywords, and aligns clauses — turning chaotic queries into readable, maintainable code. Supports PostgreSQL, MySQL, SQL Server, and SQLite dialects.
6-10: Also Worth Knowing
Cron Parser — decode cron expressions into plain English. URL Encoder — convert special characters for safe URL usage. Text Diff — compare two text blocks side by side. UUID Generator — generate random unique identifiers in bulk. AI Code Explainer — paste code and get line-by-line explanations in plain English. All available on Supertools.