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Developer Tools

Format, validate, and transform code and data directly in your browser. Developer-focused utilities for JSON, encoding, hashing, and more — all processing happens locally.

14 free tools

Developers spend a surprising amount of time on data transformation tasks — formatting JSON responses, encoding URLs, generating hashes, testing regular expressions, and converting between number bases. These are not the glamorous parts of software engineering, but they are essential and come up multiple times a day.

Toobits developer tools run entirely in your browser using native JavaScript APIs. The JSON formatter validates, pretty-prints, minifies, and renders interactive tree views of JSON data. The regex tester provides real-time pattern matching with capture group extraction and find-and-replace preview. The hash generator computes MD5, SHA-1, SHA-256, SHA-512, and SHA-3-256 from text or files using the Web Crypto API. The cron generator builds and explains Unix cron expressions visually.

All data processing happens locally. Your API responses, configuration files, code snippets, and test data never leave your device. This is especially important for developers working with production data, API keys, or any information that should not be transmitted to external services.

Developer Tools

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Internet Speed Test

Free browser-based internet speed test. Measure download speed, upload speed, ping, and jitter. No app or plugin required. Works on any device with a modern browser.

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JSON Formatter⚡ Instant

Free online JSON formatter and validator. Paste raw JSON to beautify, minify, validate, and explore with a collapsible tree view. Instant results. No signup.

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IP Address Lookup

Find your public IP address instantly. View geolocation, ISP, timezone, and network info for any IPv4 or IPv6 address. Free IP lookup tool. No signup required.

Regex Tester⚡ Instant

Free online regex tester with live match highlighting, capture group display, and replace mode. Test JavaScript regular expressions instantly in your browser. No signup required.

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URL Encoder / Decoder⚡ Instant

Free online URL encoder and decoder. Encode special characters for use in URLs or decode percent-encoded strings instantly. Supports full URLs, individual components, and query strings.

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CSV to JSON⚡ Instant

Free online CSV to JSON converter. Paste CSV or upload a file and instantly convert to formatted JSON. Also converts JSON back to CSV. Supports custom delimiters, headers, and data types. No signup.

Hash Generator

Free online hash generator. Generate MD5, SHA-1, SHA-256, SHA-512, and SHA-3-256 hashes from text or files instantly in your browser. No signup. Nothing is sent to any server.

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Markdown to HTML⚡ Instant

Free online Markdown editor with live HTML preview. Convert Markdown to clean HTML instantly. Supports GitHub Flavored Markdown, tables, task lists, and syntax highlighting. No signup required.

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Cron Generator

Free online cron expression generator and explainer. Build cron schedules visually or paste an expression to get a plain-English explanation with next run times. No signup required.

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Color Palette Generator

Free online color palette generator. Create harmonious color schemes with complementary, analogous, triadic, and monochromatic modes. Export as CSS, Tailwind, JSON, SCSS, or PNG. No signup required.

Number Base Converter⚡ Instant

Free online number base converter. Convert numbers between binary, octal, decimal, hexadecimal, and any custom base instantly. Includes bit visualization and step-by-step conversion explanation.

Binary to Text Converter

Free online binary to text converter. Convert binary code to readable text and text to binary instantly. Supports ASCII, UTF-8, spaces or no separators. No signup required.

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Contrast Checker

Free online WCAG contrast checker. Test foreground and background color combinations for AA and AAA accessibility compliance. Includes color picker, hex input, and live preview. No signup required.

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