SecureMint

Send Large Encrypted Files from iPhone / Safari

If you've ever tried to encrypt a large file on iPhone Safari with a tool like hat.sh, you've probably hit memory errors or tab crashes above a few hundred MB. Safari's strict memory limits kill most browser-side encryption tools. SecureMint was built specifically to handle this with chunked streaming AES-256-GCM so you can safely encrypt and share up to 1GB on mobile Safari — no app install, no desktop needed.

Send from iPhone
SecureMint uses zero-knowledge design. The server cannot read your data.

Steps

1

Open SecureMint in Safari

Go to securemint.app in Safari. No app needed. Works on iOS 15+ and iPadOS.

2

Select a large file

Tap the upload area and pick any file from Files.app, Photos, or iCloud Drive — up to 1GB on free, 5GB on Pro.

3

Streaming encryption happens automatically

SecureMint processes the file in small chunks rather than loading everything into memory. This avoids the Safari WASM/Blob memory ceiling that crashes other tools.

4

Share the link

Copy the generated link and send via Messages, Mail, LINE, or any app. The decryption key lives in the URL fragment.

Why It's Secure

  • Chunked streaming AES-256-GCM — keeps Safari memory usage low and stable.
  • Same zero-knowledge architecture on mobile as on desktop: the server only sees ciphertext.
  • Works on iOS Safari 15+, no background app refresh quirks, no install prompts.
  • PWA installable if you want a home-screen shortcut, but not required.

FAQ

Why do other browser encryption tools fail on iPhone?
Tools like hat.sh load the entire file into memory before encrypting. iOS Safari kills tabs that exceed ~1GB memory. SecureMint instead streams the file in chunks so peak memory stays low.
Can I send a file directly from the Photos app?
Yes. Use the file picker to choose a photo or video. SecureMint strips metadata if you enable the option.
Does the iPhone need to stay awake during upload?
Keep the Safari tab in the foreground for best results. iOS may suspend background tabs on large uploads.

Related Tools

Send Files→SecureMint vs hat.sh→How to Send Files Securely→

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