Developer Tools

Format, minify, validate, diff and tree-view JSON in your browser.

Convert JSON arrays into CSV tables.

Convert CSV data into JSON.

Format YAML and convert between JSON and YAML.

Pretty-print or minify XML with clear parse errors.

Encode and decode Base64 text safely.

URL-encode or decode strings and query values.

Encode and decode HTML entities.

Convert text to UTF-8 hex and back.

Inspect JWT header and payload (does not verify signatures).

Create signed HS256 JWT tokens for testing.

Parse and build URL query strings.

Generate UUID v4 values in bulk.

Generate strong random passwords in your browser.

Generate MD5, SHA-1, SHA-256 and SHA-512 digests.

Create BCrypt password hashes for apps and APIs.

Generate placeholder paragraphs for mockups.

Generate QR codes from text or URLs.

Beautify or minify HTML markup.

Beautify or minify CSS stylesheets.

Convert text between upper, lower and title case.

Create URL-friendly slugs from any string.

Test regular expressions with live match highlighting.

Compare two text snippets side by side.

Convert cURL commands into PHP code.

Convert Unix timestamps and human dates.

Explain common cron expressions in plain English.

Look up HTTP status code meanings quickly.

Find MIME types by file extension.

Look up IP address geolocation details.

Inspect HTTP response headers for any URL.

Create short links for long URLs.

Estimate download, upload and ping in the browser.

Convert px, rem and em with a custom root size.

Convert Unix file permissions between octal and symbolic.

Write Markdown and preview safely rendered HTML.

Live HTML, CSS and JavaScript playground.

Experiment with HTML and CSS live.

Run JavaScript snippets with console output.

Practice SQL queries in your browser.

Private multi-note workspace with autosave and Markdown.