# Wrencloud Tools

> Free tools for images, text, PDFs and security that run entirely in your web browser. Files are never uploaded: the tool pages are served with a Content-Security-Policy of connect-src 'none', so the browser refuses any network request from them.

Facts as of 2026-10-19:

- Every tool runs inside the browser tab. Files and text are read from your device into memory, processed there, and saved straight back to your device.
- The tool pages are served with the Content-Security-Policy directive connect-src 'none', so the browser blocks every network request they could make, whatever their code tried.
- No account, no sign-up and no payment. The tools are free.
- The tools keep working offline once loaded, and the site can be installed as an app.
- Passwords are never guessed or cracked. The PDF tools only open files you can already open.
- The home page carries one Google advert, which pays for the hosting and sets Google's cookies. Tool pages carry no adverts and no third-party scripts.
- There is no analytics and no database. Pinned and recently opened tools are stored in your own browser only.

## Tools

### Images

- [Redact & Blur](https://wrencloud.co.uk/tools/redact): Blur, pixelate or black out faces, names and account numbers in a screenshot. The pixels are destroyed, not covered. Runs in your browser, nothing uploaded. Handles: PNG, JPEG and WebP, or a screenshot pasted with Ctrl + V.
- [Resize & Convert](https://wrencloud.co.uk/tools/image): Resize and convert images between PNG, JPEG and WebP in bulk, trading quality against file size. Free, runs entirely in your browser, nothing is uploaded. Handles: PNG, JPEG, WebP, GIF, BMP and SVG in; PNG, JPEG and WebP out.
- [Metadata Viewer](https://wrencloud.co.uk/tools/exif): See the GPS location, camera serial number and owner name hidden in a photo, then strip them out losslessly. Free, in your browser, never uploaded. Handles: JPEG, PNG and WebP.
- [Image Padding](https://wrencloud.co.uk/tools/pad): Add transparent padding around a logo or image so a circular crop on Discord, Slack or a profile picture does not clip it. Free, and never uploaded. Handles: PNG, WebP, JPEG or GIF in; PNG or WebP out.

### Text & data

- [Text Toolkit](https://wrencloud.co.uk/tools/text): Change case, sort, deduplicate, trim, wrap and find-and-replace text, with live word and line counts. Free, runs in your browser, nothing is uploaded. Handles: Any plain text, pasted or typed.
- [JSON Studio](https://wrencloud.co.uk/tools/json): Format, minify and validate JSON with exact error positions, and convert between JSON and CSV. Free, runs in your browser, your data is never uploaded. Handles: JSON and CSV, pasted or dropped as a file.
- [Diff Checker](https://wrencloud.co.uk/tools/diff): Compare two blocks of text line by line and see exactly what was added, removed and left alone. Free, in your browser, so nothing you paste is uploaded. Handles: Plain text, pasted or dropped as files.
- [Regex Tester](https://wrencloud.co.uk/tools/regex): Test and build a regular expression against real sample text, with highlighted matches and capture groups. Free, runs in your browser, nothing uploaded. Handles: JavaScript regular expressions.

### PDF

- [PDF Unlock](https://wrencloud.co.uk/tools/pdf): Remove the owner password and permission locks from a PDF so it can be printed, copied and edited again. Free, in your browser, the file is never uploaded. Handles: PDFs restricted by an owner password, or opened with a password you know.
- [Merge PDFs](https://wrencloud.co.uk/tools/pdf-merge): Combine two or more PDFs into a single file, in any order you like. Free, in your browser, and the files are never uploaded. Handles: Any number of PDFs, including password-protected ones you can open.
- [Split a PDF](https://wrencloud.co.uk/tools/pdf-split): Cut a PDF into several files — every N pages, one file per page, or at page ranges you choose. Free, in your browser, never uploaded. Handles: Any PDF, including password-protected ones you can open.
- [Rotate a PDF](https://wrencloud.co.uk/tools/pdf-rotate): Turn PDF pages 90°, 180° or 270° and save them that way for good. Free, in your browser, and the file is never uploaded. Handles: Any PDF, including password-protected ones you can open.
- [Delete PDF Pages](https://wrencloud.co.uk/tools/pdf-delete): Remove the pages you do not want from a PDF, or keep only the ones you do. Free, in your browser, and the file is never uploaded. Handles: Any PDF, including password-protected ones you can open.

### Security

- [Hash & Checksum](https://wrencloud.co.uk/tools/hash): Get the MD5, SHA-1, SHA-256, SHA-512 or CRC-32 of any text or file, and verify a download against a published checksum. In your browser, no upload. Handles: Any text, or any file.
- [Password & IDs](https://wrencloud.co.uk/tools/generate): Generate cryptographically random passwords, passphrases and UUIDs with a strength estimate you can trust. Made in your browser, never sent anywhere. Handles: Passwords, passphrases, UUIDs, hex keys and PINs.

### Convert

- [Encode & Decode](https://wrencloud.co.uk/tools/encode): Encode and decode Base64, URL escaping, HTML entities and hex, and read a JWT. Free, runs in your browser, so your tokens are never uploaded. Handles: Base64, URL encoding, HTML entities, hex and JSON Web Tokens.
- [QR Reader](https://wrencloud.co.uk/tools/qr-read): Drop in a picture or screenshot of a QR code and see exactly what it says before you visit it. Free, in your browser, and the image is never uploaded. Handles: Photos and screenshots of QR codes.

### Everyday

- [Colour Kit](https://wrencloud.co.uk/tools/color): Convert between HEX, RGB, HSL and OKLCH, build tints and shades, and check colour contrast against WCAG. Free and runs entirely in your browser. Handles: HEX, RGB, HSL, OKLCH and CSS colour names.
- [Time & Dates](https://wrencloud.co.uk/tools/time): Convert Unix timestamps, ISO strings and time zones, with relative times and a duration calculator. Free, runs entirely in your browser. Handles: Unix seconds and milliseconds, ISO 8601 and readable dates.

## Questions

### Are the tools really free?

Yes. There is no account, no trial and no limit beyond what your own device can handle. An advert on this home page pays for the hosting; the tools themselves carry none.

### Are my files uploaded?

No. Every tool runs in your browser, and the tool pages are served with a security policy that forbids them from connecting to anything, so the browser itself would refuse to send your file. Your browser's network tab will show nothing going out.

### Do the tools work offline?

Yes. Once a tool has loaded it keeps working with the network switched off, and after your first visit your browser keeps a copy of the site so it opens offline too.

### Is it safe for confidential or client work?

That is what it is built for. Contracts, payroll, medical scans, API keys and case files never leave your device, which keeps your data-processing paperwork short.

### Do you keep a record of what I do?

No. There is no database and no analytics. Your pinned and recent tools are stored in this browser only. Like any website, the host sees requests for pages, but never what you do with a tool.

### Why does the home page have an advert?

It pays for the hosting. It is Google's, it sets Google's cookies, and it appears on this page only. A tool page is not allowed to load it, or anything else.

### Do I need to install anything?

No. It is a website. You can add it to your home screen or desktop as an app if you like, and it still runs entirely on your device.

## Pages

- [All tools](https://wrencloud.co.uk/): the library, how it works, privacy and questions.
- [Sitemap](https://wrencloud.co.uk/sitemap.xml)