Compress PDF for Gmail (Reduce Below 25MB Instantly)
Gmail's 25MB attachment limit is lower than it appears โ encoding overhead means files over 18MB can fail. Compress your PDF here before hitting send.
๐ Files never leave your deviceโก Instant processing in browser๐ธ 100% free โ no signup
โขGmail's attachment limit is 25MB per email for personal accounts.
โขIf your attachment exceeds 25MB, Gmail automatically uploads it to Google Drive and inserts a link.
๐ 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 โ 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.
๐ก Good to know
โGmail's attachment limit is 25MB per email for personal accounts.Google Help โ
โFor Google Workspace (work/school) accounts, the limit is set by the administrator and may differ.Google Help โ
โIf your attachment exceeds 25MB, Gmail automatically uploads it to Google Drive and inserts a link.Google Help โ
โGmail blocks executable file types (.exe, .js, .bat) even inside ZIP archives for security reasons.Google Help โ
โAttachments count toward your Google storage quota shared across Gmail, Drive, and Photos.Google Help โ