💻 Developer Tools

Free online developer utilities. Format JSON, test regex, generate UUIDs, encode/decode data, and more.

Subcategories

Format and beautify code

Encode and decode data in various formats

Generate UUIDs, hashes, tokens and more

Validate JSON, YAML, XML and more

Format, validate, and beautify JSON data online. Free JSON formatter with syntax highlighting, error detection, and minify option.

Encode and decode Base64 strings instantly. Free online Base64 converter tool for text and files. Works entirely in your browser.

Generate random UUID v4 strings instantly. Bulk generate unique identifiers for databases, APIs, and testing. Free online UUID/GUID generator.

Test and debug regular expressions in real-time. See matches highlighted, capture groups extracted, and get explanations. Free online regex tester.

Minify JSON by removing whitespace and formatting. Reduce file size instantly. Shows bytes saved. Free online JSON compressor.

Encode or decode URL strings. Converts special characters to percent-encoding and back. Free online URL encoder/decoder.

Encode HTML special characters to entities or decode entities back to characters. Prevent XSS and display HTML safely.

Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text. Uses browser's Web Crypto API for secure hashing.

Decode JWT tokens to see header and payload. Check expiration status. No data sent to server. Free online JWT decoder.

Generate cron expressions with an interactive builder. Presets for common schedules. Human-readable descriptions included.

Format and beautify SQL queries online. Supports MySQL, PostgreSQL, T-SQL, and standard SQL. Free SQL beautifier.

Minify CSS by removing comments, whitespace, and unnecessary characters. Reduce CSS file size instantly.

Beautify and format HTML with proper indentation. Fix messy HTML into readable, well-structured code. Free online tool.

Convert Unix timestamps to human-readable dates and vice versa. Shows current Unix time live. Handles seconds and milliseconds.