Tool directory

All free online tools.

Browse 40 fast, responsive tools for developer workflows, writing, dates, images, generators, calculators, converters, and learning.

Developer

🧰 Developer tools

JSON, regex, JWT, Markdown, encoding, formatting, UUID, and timestamp utilities for web, API, and data workflows.

11 tools
Developer

JSON Formatter

Format, minify, validate, and copy JSON data with indentation, error messages, and browser-side processing.

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Developer

Regex Tester

Test regular expressions against sample text with flags, highlighted matches, match counts, and captured groups.

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Developer

JWT Decoder

Decode JWT header and payload JSON locally in your browser without verifying signatures or uploading token text.

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Developer

Markdown Previewer

Preview Markdown as HTML for headings, links, lists, code blocks, quotes, bold, and italic text directly in your browser.

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Developer

HTML Formatter

Format simple HTML markup with indentation for readable snippets, documentation examples, templates, and debugging.

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Developer

CSS Formatter

Format CSS rules with readable line breaks and indentation for stylesheets, snippets, and design-system cleanup.

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Developer

JavaScript Minifier

Minify JavaScript snippets by removing comments and extra whitespace for examples, demos, and quick browser-side tests.

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Developer

Base64 Encoder/Decoder

Encode text to Base64 or decode Base64 back to readable Unicode text directly in your browser.

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Developer

URL Encoder/Decoder

Encode or decode URL components, query strings, spaces, symbols, and tracking parameters for safe web links.

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Developer

UUID Generator

Generate one or many random UUID v4 identifiers for databases, test data, logs, prototypes, and development workflows.

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Developer

Timestamp Converter

Convert Unix timestamps in seconds or milliseconds to local time, UTC time, ISO dates, and browser date-time values.

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Writing

✍️ Writing tools

Text utilities for writers, students, marketers, editors, content teams, and SEO workflows.

8 tools
Date & Time

⏱️ Date & Time tools

Date calculators, timers, stopwatch, timestamp conversion, and duration tools.

6 tools
Image

🖼️ Image tools

Browser-based image resizing, compression, cropping, and color tools that keep files on your device.

4 tools
Generators

✨ Generators tools

Generate QR codes, passwords, UUIDs, random numbers, placeholder text, and reusable outputs quickly.

5 tools
Calculators

% Calculators tools

Practical calculators for percentages, discounts, BMI, tips, loans, durations, and everyday math.

6 tools
Converters

⇄ Converters tools

Convert units, Base64 text, URLs, colors, file sizes, and timestamps without installing an app.

6 tools
Learning

⌨️ Learning tools

Practice-focused tools for students and keyboard users.

1 tools

How to choose the right tool

If you are debugging data, start with JSON Formatter, Regex Tester, JWT Decoder, URL Encoder/Decoder, Base64 Encoder/Decoder, UUID Generator, or Timestamp Converter. If you are preparing writing or content, use Word Counter, Character Counter, Slug Generator, Line Counter, or Remove Duplicate Lines. If you need practical estimates, try BMI, Tip, Loan, Discount, Percentage, or Time Duration calculators. For media workflows, use Image Resizer, Image Compressor, Image Cropper, Color Picker, or HEX RGB Converter.

Why each tool has its own page

Separate pages make the site easier to understand and easier for search engines to classify. Each tool targets one clear intent, explains how to use the utility, lists examples, includes privacy and accuracy notes, and links to adjacent tools and guides.

Guides

Tool guides and workflows.

Learn when to use each tool, how to avoid common mistakes, and how to verify results before publishing, printing, submitting, or deploying work.