Dev Utilities tools

Build ffmpeg commands for video and audio with explained flags.

Searchable ffmpeg command examples for video, audio and streaming.

Run real ffmpeg commands on your video, audio or image — no install.

Browse and edit source archives with syntax colors, code search, syntax trees and dependency graphs.

Minify or beautify JavaScript, CSS, HTML, JSON, XML, SQL, Java, Kotlin, C#, C/C++, Go, Swift, PHP, Python and YAML.

Unzip ZIP, TAR, GZ, 7Z, RAR and more in your browser — browse folders, preview and download files.

Open an APK, decode its manifest and browse or download every file inside.

Validate and inspect UUIDs, including version and timestamp.

Convert a JS object literal into strict, valid JSON.

Validate package.json fields, semver ranges, and scripts.

Convert install/run/exec commands between npm, yarn, pnpm and bun.

Write and run JavaScript or TypeScript with a live console.

Generate C# classes or records from JSON, with nullable reference types.

Convert between PHP serialize() format and JSON.

Convert HTML markup into clean React/JSX component code.

Convert Maven POM XML to Gradle Kotlin DSL and back.

Convert Java .properties files to JSON and back, with nested keys.

Read an APK's signing certificate and get its SHA-1, SHA-256 and MD5 fingerprints.

Open an iOS .ipa, decode Info.plist and browse or download every file inside.

Read the signing certificate and provisioning profile from an .ipa or .mobileprovision file.

Open an .aab file and inspect its manifest, modules, ABIs, densities and size breakdown.

Get SHA-1, SHA-256 and MD5 fingerprints from a .jks or .keystore file without keytool.

Build, explain and preview cron schedules with timezone-aware next runs.

Convert .env files to JSON, YAML, or shell exports.

Lint a Dockerfile for common best-practice issues.

Unix permission calculator: checkboxes, octal, and symbolic.

Validate YAML and preview it as JSON.

Generate Apache .htaccess redirect and rewrite rules.

Generate Nginx snippets for redirects, proxies, caching and security headers.

Create shell aliases for Bash, Zsh or Fish with correct quoting.

Translate whole crontab files into plain English, line by line.

Build ~/.ssh/config Host entries from simple form fields.

Validate Kubernetes manifests and catch risky container settings.

Check docker-compose.yml for errors, bad ports and risky settings.

Analyse nginx.conf for syntax, security and performance issues.

Validate a GitHub Actions workflow YAML and catch security and structure mistakes.

Build a valid docker-compose.yml from a simple service form.

Build a production-ready systemd .service unit file.

Create an .editorconfig file with per-language overrides.

Searchable reference of common git commands with copy buttons.

Compare versions and test semver ranges (^, ~, >=).

Side-by-side line diff of two code snippets with stats.

Compare two JSON documents and see added, removed and changed keys.

Record your screen, window or tab with optional microphone audio.

Measure your typing speed in WPM with live accuracy tracking.

Count code, comment and blank lines in any source file.

Points, pixels, scale factors and App Store screenshot sizes for iPhone, iPad and Apple Watch.

Convert dp, px and sp across every Android density bucket.

Searchable Android permission list with protection levels and manifest snippets.

Test regular expressions with live match highlighting.

Escape and unescape strings for JSON, JS, HTML, XML, SQL, RegExp, and shell.

Convert identifiers between camelCase, snake_case, kebab-case, and more.

Sort, dedupe, and filter lines with regex include/exclude.

Searchable regex syntax reference with examples and copy buttons.

Remove comments from JS, HTML, Python, or SQL source.

Convert indentation between tabs and spaces.

Build a linked table of contents from Markdown headings.

Turn code snippets into shareable syntax-highlighted images.

Format and indent SQL queries for readability.

Open a .sqlite/.db file in your browser and run SQL against it.

Write schema and seed SQL, then run queries against an in-memory database.

Find expensive SQL patterns, missing filters and index opportunities.

Validate IBANs with the mod-97 checksum and country length rules.

Check card numbers with the Luhn algorithm and detect the brand.

List every script, stylesheet, image, font and media file a page loads.