Prepare
ZIP for Email — Stay Under Attachment Limits
Upload files or an existing archive, select your email provider, and this tool compresses a clean ZIP, removes hidden system files, and checks whether the result stays under your provider's attachment limit. Shows a pass/fail readiness summary.
Browser — runs in your browser, no uploadAny files, ZIP
Input formats
Any filesZIP
Output formats
ZIP
Common uses
- Send photos, documents, or project files by email
- Check if a ZIP will be accepted by Gmail or Outlook
- Prepare clean attachments for professional email
- Remove junk files before attaching to email
Limitations
- Compression will not shrink already-compressed files (JPG, MP4, PDF) significantly.
- If the ZIP is too large even after optimization, you will need to split it or use a file-sharing service.
- Attachment limits shown are approximate and may vary with email plan or account settings.
Frequently asked questions
Gmail: 25 MB. Outlook.com: 20 MB. Yahoo Mail: 25 MB. Corporate Exchange: varies, often 10–20 MB. These are approximate and may change.
Use the Split ZIP tool to break it into smaller parts, or upload to a cloud storage service and share a link instead.
Usually not for size, but it makes the ZIP cleaner and more professional for the recipient.