Developer Tools

A collection of highly useful tools, mainly for developers — and not only for them.

27 tools

.gitignore Generator

Build your .gitignore from 312 official templates, including Bun, Tauri, Expo, NestJS and Cursor. It explains what each rule ignores and tests whether a path is excluded.

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Barcode Generator

Create EAN-13, EAN-8, UPC-A, Code 128, Code 39, ITF-14 and Codabar barcodes. It works out the check digit for you and downloads as SVG or PNG. All in your browser.

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Base64 Encoder and Decoder

Encode and decode text in Base64 with UTF-8 support and a URL-safe variant. Also convert files and images to Base64 or a Data URL. No sign-up.

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CSS Beautifier

Format and unminify CSS, SCSS and Less with Prettier. Choose indentation and line width, then download the result. All in your browser, nothing uploaded.

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cURL to Code Converter

Convert a cURL command into ready-to-copy code in PHP (Laravel and Guzzle), JavaScript (fetch), Node.js (axios), Python (requests) and Go. All in your browser.

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Docker Compose Validator

Validate your compose.yaml against the official Compose schema and catch key typos, wrong types and YAML errors, with the exact line. All in your browser.

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HEX, RGB and HSL Color Converter

Convert colors between HEX, RGB and HSL instantly. Includes a picker, alpha channels, a tints-and-shades palette and a WCAG contrast check.

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HTML Beautifier

Format and indent HTML and Vue templates with Prettier, including embedded CSS and JavaScript. Choose indentation and line width. All in your browser.

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HTML Minifier

Minify your HTML by removing all unnecessary characters.

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JavaScript Beautifier

Format and unminify JavaScript, TypeScript and JSX with Prettier. Control quotes, semicolons, indentation and line width. All in your browser.

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JSON to TypeScript & Code Converter

Convert any JSON into TypeScript interfaces, Zod schemas, PHP classes, Python dataclasses or Go structs. Detects nested and optional types. All in your browser.

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LLM Token Counter & AI Cost Calculator

Count the tokens in your text or prompt and estimate the cost across GPT-5, Claude, Gemini, Kimi K3, Grok and DeepSeek. Exact OpenAI counting, per-call and monthly costs, with prompt caching.

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MD5 & SHA Hash Generator

Compute the MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text or file, with a checksum verifier. All in your browser, no sign-up.

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Mexican ID Validator — RFC, CURP, CLABE, NSS

Check whether an RFC, CURP, CLABE or NSS is correct. Detects the type on its own, verifies the check digit and breaks down every part of the ID. All in your browser.

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QR Code Generator

Create QR codes for URLs, WiFi, email, phone or SMS. Customize color, size and error correction, and download them as PNG or SVG. No watermarks.

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Regex Tester

Test regular expressions in real time with match highlighting, capture groups, flags, $1 replacement and a quick reference. No sign-up.

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Secure Password Generator

Create strong random passwords instantly. Adjust length, uppercase, numbers and symbols, with a live strength meter. Everything in your browser.

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Unix Timestamp Converter

Convert Unix timestamps to a readable date (ISO, UTC, local and relative time) and dates back to a timestamp, with seconds/milliseconds detection and a live clock. No sign-up.

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URL Encoder and Decoder

Encode and decode URLs and parameters instantly, with a component or full-URL variant. Includes a query string parser. No sign-up.

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UUID Generator

Generate random v4 and time-ordered v7 UUIDs in bulk, with format options and download. Includes an inspector that detects version and variant. No sign-up.

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