Developer tools
Format a JSON response, compare two files or convert a timestamp without opening a terminal. These tools also handle Base64, UUIDs, hashes, cron schedules and Markdown. Text and file transformations run in your browser. Each tool includes examples and explains the output so you can check it before copying it into your project.
JSON formatter and minifier
Validate, format or minify JSON while preserving large numbers. Browse a source-aware tree, find keys and inspect duplicate-key warnings.
Base64 encoder and decoder
Encode text as Base64 or decode it back to text. Supports UTF-8 and URL-safe Base64.
Image to Base64 converter
Convert an image into a Base64 data URL, HTML image tag or CSS background. Preview it before copying the result.
UUID generator
Generate version 4 UUIDs individually or in batches. Inspect an existing UUID to check its version and structure.
Unix timestamp converter
Convert Unix timestamps in seconds or milliseconds to dates, or turn a date into a timestamp.
Number base converter
Convert integers between binary, octal, decimal and hexadecimal, with a view of the individual bits.
String hash generator
Calculate MD5 and SHA hashes for text, or encode it as Base64. Compare and copy the results.
Cron expression generator
Build a five-field cron schedule, read its meaning and preview the next run times.
Markdown to HTML converter
Write Markdown, preview the result and copy the HTML. Includes headings, lists, links, tables and code blocks.
Text diff checker
Compare two texts side by side or in a unified view. Highlight changed lines and words, with case and whitespace options.
Secure password generator
Generate random passwords or passphrases in your browser. Choose the length and character sets, then copy the result.
CSV and JSON converter
Convert local CSV and JSON with quoted cells, preserved identifiers, column types and downloadable output.
JavaScript regex tester
Test patterns, inspect captured groups and preview replacements with a stoppable browser worker.
URL inspector and encoder
Read URL parts and raw query pairs, remove selected parameters, and encode or decode text with explicit rules.
