Free online tools that run in your browser
Formatters, converters, calculators, and generators — fast, free, no sign-up, and nothing you enter ever leaves your device.
Developer Tools
Format, convert, decode, and debug — right in your browser.
JSON Formatter & Validator
Pretty-print, minify, and validate JSON.
CSV to JSON Converter
Turn CSV rows into JSON objects.
JSON to CSV Converter
Flatten a JSON array into spreadsheet-ready CSV.
Base64 Encoder / Decoder
Encode and decode Base64 with full Unicode support.
URL Encoder / Decoder
Percent-encode or decode URLs and query strings.
Unix Timestamp Converter
Epoch to date and back, seconds or milliseconds.
JWT Decoder
Inspect a JWT's header, payload, and expiry.
Text Tools
Count, clean, compare, and transform text instantly.
Word Counter
Words, characters, sentences, reading time.
Case Converter
UPPER, lower, Title, camel, snake, kebab.
Remove Duplicate Lines
Strip repeated lines, keep the original order.
Sort Lines Alphabetically
A→Z, Z→A, with natural number ordering.
Text Compare (Diff Checker)
Line-by-line diff with highlights.
URL Slug Generator
Titles into clean, SEO-friendly URL slugs.
Calculators
Quick, accurate answers for money and math questions.
Generators
Create UUIDs, passwords, and more with one click.
Guides
Honest comparison guides, ranked by merit.