Finding the right developer tools can save hours every day. We have curated the best free online tools every developer should bookmark in 2026.
JSON & Data Tools
JSON Formatter — Format, validate and minify JSON instantly. Essential for API development and debugging.
XML Formatter — Format and validate XML documents for web services and config files.
SQL Formatter — Beautify complex SQL queries for MySQL, PostgreSQL and more.
Security & Hashing
Hash Generator — Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text or files.
Password Generator — Create cryptographically secure passwords with custom rules.
JWT Decoder — Decode and inspect JSON Web Tokens without needing the secret key.
Encoding Tools
Base64 Encoder/Decoder — Encode and decode text, files and images to Base64.
URL Encoder — Encode and decode URLs for web development.
HTML Entity Encoder — Convert special characters to safe HTML entities.
Code Tools
Code Formatter — Format HTML, CSS, JS, Python, Kotlin, Swift and 15+ languages.
Regex Tester — Test regular expressions with real-time highlighting and match groups.
Diff Checker — Compare code or text files side by side with LCS algorithm.
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Color Picker — Professional color picker with HEX, RGB, HSL, CMYK and color harmonies.
Gradient Generator — Create linear, radial, conic, mesh and pattern gradients.
Font Detector from Image — Upload any image and AI identifies the font instantly.
AI-Powered Tools
AI Code Explainer — Paste any code and get a plain-English explanation.
AI Bug Finder — Scan code for bugs, crashes and security issues with fix suggestions.
AI Code Converter — Convert between Java, Kotlin, Flutter, Swift and more languages.