Free online tools.

Small, fast tools for developers, designers, writers and everyday tasks. They run in your browser, so what you type stays on your device.

All tools

For developers

  1. 01 JSON Formatter & Validator Format, validate and minify JSON, with error locations.
  2. 02 Base64 Encoder & Decoder Encode and decode Base64, with UTF-8 and URL-safe support.
  3. 03 UUID Generator (v4) Generate random version 4 UUIDs in bulk, ready to copy.
  4. 04 Regex Tester Test regular expressions with live highlighting and capture groups.
  5. 05 Unix Timestamp Converter Convert Unix timestamps to dates and back, in seconds or milliseconds.

For designers and artists

  1. 01 Color Converter (HEX, RGB, HSL) Convert HEX, RGB and HSL, and check the contrast of text on the color.
  2. 02 Color Palette Generator Build harmonious palettes from one color and copy them as HEX or CSS.
  3. 03 Aspect Ratio Calculator Find a ratio and resize to a new width or height without distortion.
  4. 04 Lorem Ipsum Generator Generate placeholder text in paragraphs, sentences or words, with optional HTML.

Writing and text

  1. 01 Word & Character Counter Count words, characters and sentences, with reading time.
  2. 02 Case Converter Change text to uppercase, lowercase, title case, camelCase, snake_case and more.
  3. 03 Character Counter Count characters and check your text against the limits of social networks, SMS and SEO.

Everyday and business

  1. 01 Secret Santa Generator Draw gift-exchange names in a minute, with exclusions for couples.
  2. 02 Profit Margin & Markup Calculator Find your profit margin, markup or the price you need to charge.
  3. 03 QR Code Generator Make a QR code for a link or text and download it as PNG or SVG.
  4. 04 Random Password Generator Create strong random passwords, with the length and characters you choose.
  5. 05 Percentage Calculator Find a percentage of a number, a percentage change, or add and take off a percent.