The limit says 25MB — why does my 24MB file bounce?

Email encodes attachments in base64, inflating them ~33% in transit; some servers measure that inflated size. This tool aims comfortably under your target, but for strict servers try a 18-20MB custom target.

How many minutes fit in 25MB nicely?

Around 3-5 minutes at solid 720p quality. For a longer screen recording, consider trimming to the relevant section first — the quality budget goes a lot further.

Can I split a long video across two emails instead?

Yes, and it is often the better option. Cut the video into two parts with the Video Trimmer, compress each to 25 MB here, and each half gets twice the bitrate a single file would have.

Does the compressed file keep the sound?

Yes. The audio track is part of the size calculation, so it is included and the video bitrate is set around it. On a long clip the audio takes a noticeable share of the 25 MB budget.

Compress Video to 25MB for Email — Gmail & Outlook Limit

Fit a video under the 25MB attachment cap of Gmail and Outlook — exact-size, private, no upload.

Target size

Drop your video here or click to choose

bitrate calculated from your target — compressed on your device, never uploaded

The 25 MB figure comes from Gmail, whose attachment limit is 25 MB per message, and it is shared by many Outlook and Exchange mailboxes. Cross it and Gmail quietly replaces the file with a Google Drive link, fine for a friend, useless for an insurer, a court clerk or a corporate inbox that blocks external links. A dashcam clip for a claim or a recording for a lawyer has to arrive as an attachment.

This page is set to a 25 MB target and works by arithmetic rather than guesswork. It starts from the clip's duration, derives the bitrate that lands under 25 MB after allowing for the audio track and container overhead, and encodes at that rate; if the first pass overshoots, it measures by how much and encodes once more. At tight budgets it also lowers the resolution, since a clean 720p is better than a 1080p picture full of blocks. The whole job is done on your device, so a clip that is evidence is never uploaded.

Be realistic about what 25 MB holds. A three-minute phone clip fits with quality to spare; a fifteen-minute screen recording fits only by dropping to a low resolution. For a long video, cut it to the relevant section with the Video Trimmer first, or split it into two emails, each with its own 25 MB budget.

More sizes & options

Frequently asked questions

The limit says 25MB — why does my 24MB file bounce?: Email encodes attachments in base64, inflating them ~33% in transit; some servers measure that inflated size. This tool aims comfortably under your target, but for strict servers try a 18-20MB custom target.
How many minutes fit in 25MB nicely?: Around 3-5 minutes at solid 720p quality. For a longer screen recording, consider trimming to the relevant section first — the quality budget goes a lot further.
Can I split a long video across two emails instead?: Yes, and it is often the better option. Cut the video into two parts with the Video Trimmer, compress each to 25 MB here, and each half gets twice the bitrate a single file would have.
Does the compressed file keep the sound?: Yes. The audio track is part of the size calculation, so it is included and the video bitrate is set around it. On a long clip the audio takes a noticeable share of the 25 MB budget.

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🔒 Your files are processed on your device. This tool runs entirely in your browser — nothing is uploaded.