Developer

JSON Formatter

Format JSON online (pretty-print with indentation), minify to compact form, or validate for syntax errors — free, no installation required.

Base64

Encode or decode text, URLs or binary data in Base64 online — URL-safe mode included, no upload, no sign-up, runs entirely in your browser.

URL Encoder

Encode or decode URLs online, or parse them into components (protocol, host, path, query parameters) — free, no upload, runs in browser.

Hash Generator

Hash text or file content with MD5, SHA-1, SHA-256 or SHA-512 online — generate checksums and fingerprints right in your browser, free.

Regex Tester

Test a regular expression against a string and see all matches with their positions.

Cron Parser

Validate a cron expression and calculate the next scheduled execution times.

Timestamp Converter

Convert a Unix timestamp to a human-readable date (local, UTC, ISO 8601) or the reverse.

Number Base Converter

Convert any integer between decimal, binary, hexadecimal and octal — all four fields are simultaneously input and output.

JWT Decoder

Decode a JSON Web Token (JWT) online and inspect header, payload, claims and expiry — no signature verification, free, no upload needed.

HTML Entities

Encode or decode HTML special characters online — convert &, <, >, " and Unicode characters to and from HTML entities, no install, free.

JSON ↔ CSV

Convert JSON arrays to CSV spreadsheets and back online — choose your own delimiter, no upload required, free and runs in your browser.

chmod Calculator

Convert Unix file permissions between octal notation (e.g. 755, 644) and symbolic (rwxr-xr-x) online — for Linux, macOS and shell scripts, free.

HTTP Status Codes

Look up and search all HTTP status codes (1xx–5xx) online — meanings and categories, from 200 OK to 404 Not Found and 503 Service Unavailable.

XML ↔ JSON

Convert XML to JSON and JSON to XML online — right in your browser, no upload, no server required, free for developers and API integration.

XML Formatter

Format XML (pretty-print with selectable indentation) or minify it — right in your browser.

TOML / YAML / JSON

Convert between JSON, YAML and TOML — any direction, right in your browser.

SQL Formatter

Format SQL (pretty-print) — with dialect, keyword case and indentation, right in your browser.

.gitignore Generator

Build a .gitignore from common templates (Node, Python, PHP, macOS …).

robots.txt Generator

Create a robots.txt with allow/disallow rules and a sitemap reference.

package.json Generator

Generate a package.json with all key fields (name, version, dependencies, scripts) for npm, Yarn or pnpm projects online — free, no npm needed.

tsconfig.json Generator

Generate a TypeScript config (tsconfig.json) with common options.

CSP Header Generator

Build a Content-Security-Policy header from the key directives.

Commit Message Generator

Build a Conventional Commits message (type/scope/description).

.env Checker

Validate and normalize a .env file (check keys, quote values with spaces).

.htaccess Generator

Build an Apache .htaccess with common rules (HTTPS, www, caching …).

Nginx Config Generator

Generate an Nginx server block from server name, root, port and options.

docker-compose Generator

Generate a docker-compose.yml for one service (image, ports, env, volumes).

.htpasswd Generator

Generate .htpasswd entries for Apache HTTP Basic Auth online — enter username and password, get a hash instantly, no server or tool required.

cURL → Code

Convert a curl command into JavaScript (fetch), Python (requests) or PHP (cURL).

User-Agent Parser

Break a user-agent string into browser, operating system and device type.

README Generator

Generate a README.md (Markdown) from project name, description, installation and usage.

JSON Diff

Compare two JSON structures online and highlight all differences (added, changed, removed) — no upload, no sign-up, free and runs in browser.

JSONPath Tester

Query JSON values online using a JSONPath expression ($.store.book[0]) — recursive search included, free and runs right in your browser.

JSON → TypeScript

Automatically generate a TypeScript interface or type definition from any JSON object online — type-safe, free, no upload or sign-up needed.

HTML Preview

Render arbitrary HTML live in a sandboxed iframe online — inspect structure and CSS instantly without a server, no sign-up, completely free.

CSS Minifier

Minify CSS online — strip comments, unnecessary whitespace and blank rules to reduce file size, no upload, free and runs right in your browser.

JS Minifier

Minify JavaScript — remove comments, indentation and blank lines.

HTML Formatter

Beautify or minify HTML online — produce clean, properly indented code or a compact minified source, no upload, free and runs in browser.