25MB is the attachment limit for Gmail and Yahoo Mail. Compress your PDF to just under that limit here.
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Drop your PDF here to fix upload errors
or click to select file — PDF only
Target size (optional)
targeting 25 MB
⚡ File Size Limits (Quick Fix)
•25MB is the attachment limit for Gmail and Yahoo Mail.
•Outlook.com is more restrictive at 20MB, so a 24MB PDF will send on Gmail but not Outlook.
•Base64 encoding adds ~33% to file size in transit — a 25MB file is ~33MB on the wire. Email servers measure the encoded size, so staying under 24MB is safer.
👉 Fix: Compress your file below 25 MB using the tool above.
About this tool
Gmail and Yahoo Mail both cap attachments at 25MB. Files slightly over this limit are the most common cause of bounced emails.
How to use this tool
Select or drag and drop your file into the tool above.
Adjust the settings or target size as needed for your specific requirement.
Wait a moment while your file is processed directly in your browser.
Download the final file safely to your device.
💡 Good to know
→25MB is the attachment limit for Gmail and Yahoo Mail.Google Help ↗
→Outlook.com is more restrictive at 20MB, so a 24MB PDF will send on Gmail but not Outlook.
→Base64 encoding adds ~33% to file size in transit — a 25MB file is ~33MB on the wire. Email servers measure the encoded size, so staying under 24MB is safer.
It will send on Gmail and Yahoo Mail (25MB limit) but not on Outlook.com (20MB limit). Compress to under 20MB to cover all platforms.Source: Google Help ↗
Why does my 25MB PDF get rejected even though the limit is 25MB?+
Email attachments are base64-encoded in transit, which increases the actual size by about 33%. A 25MB file becomes ~33MB encoded, exceeding the limit.Source: Google Help ↗
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