File Tools
Encrypt, split, zip and inspect any kind of file. 8 tools
File utilities handle the awkward practicalities: encrypting something before it leaves your outbox, splitting a file past an attachment limit, rejoining the pieces at the other end, bundling a folder into a ZIP, extracting an archive, or working out what an unidentifiable file actually is.
Encryption is the clearest case for keeping this local. Uploading a plaintext file to a website in order to encrypt it means the unprotected version — and often the password — sits on someone else's machine, which defeats the exercise. These tools use the browser's own audited Web Crypto implementation and the File API, so your data and your passphrase never leave the tab, and there is no size limit beyond your device's memory.
All 8 file tools, free and without an account
Every tool listed above runs entirely inside your browser. Nothing you open is uploaded, there is no sign-up, no file-size limit, and no watermark on anything you export. Pick a tool to get started, or use the search box at the top of the page to jump straight to one.
Each tool page includes a written guide explaining what the tool does, why it works the way it does, and the mistakes that most often catch people out. Longer walkthroughs live on the blog, and you can read more about who builds these and exactly what data we handle in the privacy policy.