•Gmail's attachment limit is 25MB per email for personal accounts.
•If your attachment exceeds 25MB, Gmail automatically uploads it to Google Drive and inserts a link.
👉 Fix: Compress your file below 25 MB using the tool above.
About this tool
Gmail's 25MB limit applies to the encoded email size, not the raw file. Base64 encoding adds ~33% in transit — a 20MB PDF becomes ~27MB on the wire. Compressing to under 18MB clears the limit with room to spare. Uploading to ChatGPT instead of email? Use the <a href="/compress-pdf-for-chatgpt">Compress PDF for ChatGPT</a> tool.
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
→Gmail's attachment limit is 25MB per email for personal accounts.Google Help ↗
→For Google Workspace (work/school) accounts, the limit is set by the administrator and may differ.Google Help ↗
→If your attachment exceeds 25MB, Gmail automatically uploads it to Google Drive and inserts a link.Google Help ↗
→Gmail blocks executable file types (.exe, .js, .bat) even inside ZIP archives for security reasons.Google Help ↗
→Attachments count toward your Google storage quota shared across Gmail, Drive, and Photos.Google Help ↗