Developer Tools
29 free tools. A workbench for everyday development tasks: format and validate JSON, convert between CSV and JSON, encode and decode Base64 and URLs, test regular expressions, generate hashes, UUIDs and slugs, preview HTML and Markdown live, and build CSS visually.
JSON Formatter
Format, indent and beautify JSON data so it is easy to read.
JSON Validator
Check whether your JSON is valid and find the exact error.
Base64 Encoder
Encode text or files to Base64 with a single click.
Base64 Decoder
Decode Base64 text back to readable text or a file.
URL Encoder
Encode text so it can be used safely inside a URL.
URL Decoder
Decode percent-encoded URLs back into readable text.
UUID Generator
Generate random UUID v4 identifiers — one or a whole batch.
Timestamp Converter
Convert Unix timestamps to dates and dates to timestamps.
Regex Tester
Build and test regular expressions with live match highlighting.
Slug Generator
Turn any title into a clean, URL-friendly slug.
HTML Entity Encoder
Encode or decode HTML entities like &, < and ©.
Hash Generator
Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text.
Number Base Converter
Convert numbers between binary, octal, decimal and hexadecimal.
JSON to CSV Converter
Convert a JSON array of objects into a CSV spreadsheet.
JWT Decoder
Decode the header and payload of a JSON Web Token.
CSS Minifier
Compress CSS by removing comments and unnecessary whitespace.
HTML Viewer
Paste HTML and preview it live in desktop, mobile and side-by-side tab views.
Markdown Previewer
Write Markdown on the left and see the formatted result instantly.
CSV to JSON Converter
Convert CSV data with a header row into a JSON array of objects.
CSS Gradient Generator
Build linear or radial gradients visually and copy the CSS.
Box Shadow Generator
Design CSS box shadows with sliders and copy the CSS.
Border Radius Generator
Shape rounded corners visually and copy the CSS border-radius.
Meta Tag Generator
Generate SEO and social sharing meta tags for any page.
HTML Minifier
Shrink your HTML by removing comments and extra whitespace — smaller files, faster page loads.
JavaScript Minifier
Compress JavaScript by removing whitespace, shortening names and optimizing code — safely, in your browser.
SQL Formatter
Beautify messy SQL queries with clean indentation — supports MySQL, PostgreSQL, SQL Server and more.
XML to JSON Converter
Convert XML into clean, readable JSON — attributes, nested tags and repeated elements all handled.
JSON to XML Converter
Turn JSON into well-formed, indented XML — objects, arrays and special characters all handled correctly.
CSV Splitter
Break a large CSV into smaller files — by rows per file or total number of files — with headers kept.