Developer Tools
JSON, Base64, UUID and encoding utilities.
JSON Formatter
Format, validate and beautify JSON.
Base64 Encode/Decode
Encode and decode Base64 strings.
UUID Generator
Generate random UUIDs instantly.
2FA Code Generator
newGenerate 2FA / TOTP codes from a secret key, right in your browser.
Regex Tester
newTest JavaScript regular expressions with live matches and groups.
Color Palette
newBuild accessible color palettes and export CSS variables.
Favicon Generator
newCreate favicon PNG sizes and a downloadable web icon package.
JWT Decoder
newDecode JWT headers and payloads, then inspect expiry and common claims.
Hash Generator
newGenerate SHA hashes for text or files with the browser Web Crypto API.
JSON ↔ CSV
newConvert JSON arrays to CSV and CSV tables back to JSON.
Timestamp Converter
newConvert Unix seconds or milliseconds to local and UTC dates.
URL Encode / Decode
newPercent-encode or decode URL components and complete URLs.
Text Diff Checker
newCompare two texts line by line and highlight additions and removals.
JSON to TypeScript
newTurn JSON objects into clean TypeScript interfaces or type aliases.
JSON ↔ YAML
newConvert JSON to YAML and YAML back to formatted JSON.
XML Formatter
newFormat, validate and minify XML with clear syntax errors.
SQL Formatter
newFormat and minify SQL queries for popular database dialects.
Markdown Preview
newWrite Markdown with a live preview and export clean HTML.
Cron Generator
newBuild common cron schedules visually and understand the expression.
Free Developer Tools that work in your browser
Choose from 19 ready-to-use developer tools for quick everyday tasks. Every tool opens instantly, requires no account and is designed to work on desktop and mobile.
Toolastic keeps the workflow simple: select a tool, complete the task and download or copy the result. Wherever possible, processing happens locally on your device for better speed and privacy.