These tools help you work with JSON, JavaScript, SQL, URLs, and other common developer tasks. You can format code, convert data, check values, and create test data safely in your browser. Web developers and software engineers use these to speed up their daily work. Explore our 21 free tools below.
Create and understand cron schedules in plain English.
Convert Unix timestamps into normal dates you can read.
Create fake testing data (like names and emails) in JSON or CSV.
Format your messy JavaScript or TypeScript code to make it neat.
Turn JSON data into TypeScript types automatically.
Build CSS Grid layouts visually and copy the code.
Test and fix your Regular Expressions (Regex). It is completely free and very easy to use.
Turn any text into a clean URL slug. It is completely free and very easy to use.
Format your SQL queries to make them easy to read.
Escape or unescape special characters in your text.
Compare two pieces of text or code to see what changed.
Look up ASCII characters, decimals, and hex values.
Generate a unique Version 4 UUID. It is completely free and very easy to use.
Change XML data into JSON format. It is completely free and very easy to use.
Change YAML text into JSON format. It is completely free and very easy to use.
Format, check, and read JSON data easily. It is completely free and very easy to use.
Turn CSV spreadsheets into JSON format. It is completely free and very easy to use.
Encode or decode text and files using Base64. It is completely free and very easy to use.
Format and clean up your CSS code. It is completely free and very easy to use.
Use this HTML toolkit to format, clean, and minify your HTML code in your browser.
Make SVG files smaller and cleaner. It is completely free and very easy to use.