Developer

Format, validate and convert JSON, XML, SQL, HTML, CSS, JS and more — one developer workspace.

Browser HTML/CSS/JS editor with live sandboxed preview, templates and export.

CSV, TSV, query strings and table tools in one workspace.

Beautify, minify and validate JSON with instant error reporting.

Encode text to Base64 or decode Base64 back to plain text.

Percent-encode or decode URLs and query string components.

Decode and inspect the header and payload of a JSON Web Token.

Convert between Unix timestamps and human-readable dates.

Convert numbers between binary, octal, decimal and hexadecimal.

Escape or unescape HTML entities like & and <.

Turn CSV data into structured JSON (and back).

Test regular expressions against text with live highlighting.

Convert between JSON and YAML in both directions.

Beautify and indent XML, or minify it to one line.

Shrink HTML by removing comments and extra whitespace.

Minify CSS by removing comments and whitespace.

Format SQL queries with keyword casing and line breaks.

Convert URL query strings to JSON and back.

Break a URL into protocol, host, path, query and hash.

Generate TypeScript interfaces from a JSON sample.

Translate a 5-field cron expression into plain language.

Remove whitespace and comments from JavaScript code.

Convert XML documents to JSON.

Convert JSON objects to XML markup.

Parse .env files into JSON or export as key=value lines.

Convert Markdown to clean HTML markup.

Escape or unescape strings for use inside JSON.

Compare two semantic version strings.

Convert between tab-separated and comma-separated values.

Strip HTML tags and get readable plain text.

Look up code point, UTF-8 bytes and name for any character.

Convert between numeric and symbolic Unix file permissions.

Convert .properties / env lines to JSON.

Recursively sort JSON object keys.

Escape special characters for HTML.

Decode HTML entities to plain text.

Flatten nested JSON into dot-notation keys.

Encode text to Base32.

Convert text to hexadecimal bytes.

Decode hex back to text.

Generate a .gitignore for common stacks.

Uppercase SQL keywords for readability.

Bump patch, minor or major version.

Pull valid JSON objects from mixed text.

Check if a cron expression has 5–6 fields.

Minify JSON to one line.

Beautify JSON with indentation.

URL-encode each line.

URL-safe Base64 encoding.

Read exp claim from a JWT.

Remove UTF-8 byte order mark.

Unix and ISO timestamps for now.

Browse and format OpenAPI/Swagger specs.

Decode JWT header, payload and expiry details.

Inspect HTTP Archive (HAR) capture files.

Parse Set-Cookie and Cookie header strings.

Build Content-Security-Policy headers.

Decode CSP directives for readability.

Test cross-origin requests via proxy.

Compare two HTTP header blocks.

Resolve A, AAAA, MX, TXT and CNAME records.

Inspect TLS certificate for a hostname.

Fetch and validate robots.txt for a site.

Validate sitemap.xml structure and URLs.

Infer JSON Schema from sample JSON.

Inspect UUID version and variant.

Build cron schedules visually.

Compare two semantic versions.

Diff two .env files.