TooldenFree Online Tools for Everyone
Fast, privacy-friendly tools that run entirely in your browser. No signup, no uploads, no ads clutter.
JSON Formatter
Format, minify and validate JSON in seconds. Catch syntax errors with exact positions.
Word Counter
Count words, characters, sentences and paragraphs live. Includes reading and speaking time.
Base64 Encoder / Decoder
Encode text to Base64 or decode it back. Unicode-safe with strict validation.
URL Encoder / Decoder
Percent-encode text for URLs and query parameters, or decode it back.
Case Converter
Switch between lower case, UPPER CASE, Title Case, camelCase, snake_case and more, live.
UUID Generator
Generate random UUID v4 identifiers in bulk, with one-click copy for each.
Password Generator
Generate strong random passwords with Web Crypto. Pick length and character sets.
Timestamp Converter
Convert Unix timestamps to dates and back, in UTC, your timezone and ISO 8601.
Hash Generator
Compute SHA-1, SHA-256, SHA-384 and SHA-512 hashes with Web Crypto.
Lorem Ipsum Generator
Generate placeholder text for designs and mockups. Pick length and paragraph count.
Number Base Converter
Convert between binary, octal, decimal and hexadecimal, live as you type.
Color Converter
Convert colors between HEX, RGB and HSL with a live preview swatch.
Slug Generator
Turn any text into clean, URL-friendly slugs for posts, routes and filenames.
Caesar Cipher
Encrypt or decrypt text by shifting letters. Includes the classic ROT13.
Roman Numeral Converter
Convert between decimal numbers and Roman numerals, 1 to 3999.
HTML Entity Encoder
Escape text into HTML entities or decode entities back to readable text.
JWT Decoder
Decode any JSON Web Token header and payload into readable JSON.
Card Number Validator
Validate card numbers with the Luhn check and detect the brand, including RuPay.
Random Number Generator
Generate random numbers in any range with Web Crypto, optionally unique.
Regex Tester
Test regular expressions live with highlighted matches, indices and groups.
Diff Checker
Compare two texts and see added and removed lines highlighted side by side.
QR Code Generator
Create scannable QR codes from any text or URL, with size and error correction options.
Markdown Preview
Write markdown and see the rendered HTML live, with GitHub-flavored tables and code blocks.
JSON to CSV
Convert JSON arrays of objects into spreadsheet-ready CSV with automatic columns.