Simple, privacy-focused web tools built to solve real-world development problems

Image Tools

• Image Converter & Resizer: Resize images and convert between WebP, PNG, JPG, ICO, and BMP, with photo metadata removed.
• SVG Path Rotator: Rotate SVG path data by any angle and copy the updated path.
• PNG to WebP Converter: Convert PNG images to smaller WebP files for the web, keeping transparency.
• JPG to WebP Converter: Convert JPG photos to WebP for faster loading pages, at the quality you choose.
• WebP to PNG Converter: Convert WebP images to PNG to open and edit them in any app.
• WebP to JPG Converter: Convert WebP images to JPG for apps and sites that do not accept WebP.
• PNG to JPG Converter: Convert PNG photos and screenshots to much smaller JPG files.
• JPG to PNG Converter: Convert JPG photos to PNG to edit them without further quality loss.
• Favicon Generator: Make a favicon.ico for your website from a PNG, JPG, or WebP image.
• Image Resizer: Resize images to an exact width or height, keeping their proportions and format.
• EXIF Remover: Remove GPS location, camera details, and other hidden data from photos before sharing.
• Image to Base64: Turn an image into a Base64 data URL, with ready-to-paste HTML and CSS.

Developer Tools

• JWT Decoder: Decode JSON Web Tokens to read the header, payload, and expiry, without sending them anywhere.
• OpenAPI Viewer: View an OpenAPI specification from any URL as readable API documentation.
• JSON Formatter & Validator: Format, validate, and minify JSON, with the line and column of any error.
• Base64 Encoder & Decoder: Encode text or files to Base64 and decode it back, with UTF-8 and URL-safe support.
• URL Encoder & Decoder: Percent-encode text for URLs and query strings, or decode it back to readable text.
• Hash Generator: Get MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes of text or files, and check a file against its hash.
• Unix Timestamp Converter: Convert Unix timestamps to readable dates in UTC and your time zone, and dates back to timestamps.

Color & Design Tools

• Color Converter: Convert colors between HEX, RGB, HSL, and CMYK, with a color picker and preview.
• Color Contrast Checker: Check text and background colors against the WCAG AA and AAA contrast levels.

Text Tools

• Word Counter: Count words, characters, sentences, and paragraphs, with reading and speaking time.
• Case Converter: Convert text to upper, lower, title, or sentence case, or to camelCase, snake_case, and other code cases.
• Diff Checker: Compare two texts line by line and see what was added, removed, or changed.

Generators

• UUID Generator: Generate random version 4 or time-ordered version 7 UUIDs, up to 1,000 at once.
• Password Generator: Generate strong random passwords with your choice of letters, numbers, and symbols.

Introduction

Welcome to Ap Tul, a growing collection of online utilities designed to streamline the day-to-day tasks of software development.

This site is built on a simple philosophy: Necessity breeds creation.

As a software developer, I often encounter niche tasks - like specific file conversions or data formatting - that require simple, immediate solutions. Instead of scouring the web for ad-heavy third-party tools, I build the solutions I need myself and add them here. The result is a library of lightweight, purpose-built tools that prioritize function, speed, and privacy.

Why Use Ap Tul?

• Built for Real Workflows: Every tool on this site exists because it was needed for a real project.
• Privacy First: Many online tools require uploading files to a server. My tools, like the Image Converter, utilize technologies like Rust and WebAssembly to process data directly in your browser.
• No Clutter: No paywalls, no aggressive ads, just the utility you need.

Tool Spotlight: Image Converter & Resizer

I recently needed a fast way to batch-convert PNGs to WebP and resize them for a web project. The result is the Ap Tul Image Converter.

• Features: Resize images with preserved aspect ratios, convert formats (PNG, WebP, JPG, ICO), and automatically strip sensitive metadata (GPS, EXIF) for enhanced privacy.
• Tech: Powered by Rust and WebAssembly for native-level performance within the browser.

What's Next?

Ap Tul is in active development. As I tackle new challenges in my software engineering career, this library will grow. Bookmark this page to keep these utilities handy for your own workflow.