MU Tools

MU Tools is a free, no-signup collection of over 40 browser-based utilities for image editing, PDF manipulation, text processing, color design, data conversion, and more — all processing stays on your device.

What is MU Tools?

MU Tools is an online toolkit that runs entirely in your browser at my-util.com/en. No signup or installation required. It offers utilities across categories like Image, PDF, Web Analysis, Color & Design, Text, Encoding, Data Conversion, and Other. All processing happens locally, so your files and data never leave your device. The tools are developed by an anonymous team and are free for both personal and commercial use.

Key Features

• Local processing — All tools run client-side; no data is uploaded to any server (except tools that look up external URLs/IPs/domains).
• No signup or install — Open any tool and use it immediately on desktop or mobile.
• 40+ tools — Covering compression, cropping, PDF merging, text extraction, color picking, JSON formatting, and more.
• Free for commercial use — No restrictions on personal or commercial projects.
• Multi-language support — Available in Japanese, English, Simplified Chinese, Traditional Chinese, Korean, and Indonesian.
• Specific outputs — Image Compressor offers JPG quality slider and PNG lossless; PDF Merger combines up to 10 files; CSV to JSON converter supports type inference and JSONL; etc.

Who is it for?

• Web developers — Use the image optimizer, WebP converter, favicon generator, and JSON formatter to speed up asset preparation.
• Content creators — Crop, resize, and merge images; extract text from PDFs; generate QR codes for links.
• Office workers — Merge PDFs, check date durations, convert units, and count characters in documents.
• SEO specialists — Extract meta tags, headings, and Open Graph tags from URLs; check IP and Whois info.

What can you do with MU Tools?

• Compress images without losing quality — adjust JPG quality or losslessly optimize PNGs.
• Merge or split PDFs — combine up to 10 files or split by page range.
• Extract text from images and PDFs — use OCR on screenshots or pull text from PDF documents.
• Generate passwords and QR codes — create random passwords or QR codes for URLs, Wi-Fi, contacts, and more.
• Test regex and format JSON — debug regular expressions live or beautify JSON with indentation.
• Convert between color formats — pick colors from images, get HEX/RGB/HSL, and check contrast against WCAG.

How does it work?

Simply navigate to any tool on the site, upload or paste your input, and the tool processes it immediately in your browser. There is no server round-trip for data-sensitive operations. For external lookups (e.g., Whois, IP), a temporary request is made to retrieve public data.

Pricing

MU Tools is completely free. No tiers, no paid plans.

FAQ

Is MU Tools free?

Yes, every tool is free to use for personal and commercial purposes without any sign-up.

Are my files uploaded to a server?

For most tools, all processing happens locally in your browser. The only exception are tools that look up external information (URLs, domains, IPs), which send a temporary request through a server.

What languages are supported?

The site and all tools are available in Japanese, English, Simplified Chinese, Traditional Chinese, Korean, and Indonesian.

Do I need to install anything?

No installation is required. Everything runs in your web browser on desktop, tablet, and smartphone.

Can I use the tools commercially?

Yes. You may use them freely for commercial projects without any extra steps or fees.