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File Size Limits and Cautions

Published: Oct 19, 2026 | Updated: Oct 19, 2026 | About (Japanese)

Key points
  • Keep to 300 MB
  • Mind memory
  • Split large files

Encrypt a File processes files in the browser, so it depends on device memory.

Steps

  1. Keep files to 300 MB
  2. On phones, smaller files are safer
  3. Split or compress large files first
Do not close the page until processing finishes.
Use "Encrypt and Decrypt a File with a Password" (free)

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