FLV → Gmail / Email
Compress FLV for Gmail / Email
Compressing FLV for Gmail / Email comes down to three constraints: Gmail / Email's 25 MB cap, its 1280:720 resolution ceiling, and the need to output MP4 H.264 for reliable inline playback. FLV source files are typically 480p (legacy Flash Video) at around 15 MB per minute — right at Gmail / Email's 23 MB target. We calculate a per-clip bitrate budget from your duration, subtract 128 kbps for audio, and allocate the remainder to H.264 video at the highest quality that fits. FLV's H.263 or Sorenson Spark video gets replaced with H.264; the format is obsolete and no modern platform plays it. Gmail / Email does not play FLV inline, so this page does a format conversion (FLV → MP4 H.264) plus the size compression in a single pass.
Where do you want to share your video?
How to compress FLV for Gmail / Email
- 1Drag your .flv file onto the upload zone above (or browse to it).
- 2Gmail / Email is already selected — we'll target 23 MB to stay safely under the 25 MB cap.
- 3Optionally trim to a highlight clip or switch to H.265 for 30-50% smaller files at the same quality.
- 4Download the compressed MP4 and share it on Gmail / Email. Source file auto-deletes from our servers after 1 hour.
What to know about FLV → Gmail / Email
- FLV's H.263 or Sorenson Spark video gets replaced with H.264; the format is obsolete and no modern platform plays it.
- Resolution is downscaled to fit 1280p for clean output at the required bitrate.
- Trim to the highlight before you compress — every 10 seconds you cut gives remaining frames more bitrate to work with.
- Gmail / Email's 23 MB target leaves a 5% safety margin below its 25 MB hard cap, so platform-side rejection is never an issue.
The compression math
A 1-minute FLV at 480p (legacy Flash Video) = ~15 MB. Gmail / Email's 23 MB target minus 128 kbps audio = ~3087 kbps video budget. H.264 at that budget downscaled to fit 1280p for clean output at the required bitrate produces a file at the target size that plays inline on Gmail / Email.
About FLV files
FLV (Flash Video) was the dominant web video format from 2005 to 2015, used by early YouTube, Newgrounds, and countless Flash-based websites. With Flash Player's discontinuation in 2020, FLV files cannot play in any modern browser or device without conversion. CompressYourVideo.com converts FLV to compressed MP4, making your old Flash videos playable again on every device. This is essential for anyone with archives of old web video downloads, Flash game recordings, or early YouTube saves. The conversion typically reduces file size while dramatically improving compatibility, since modern H.264 encoding is far more efficient than the codecs used in FLV files from the 2000s.
About Gmail / Email
Compress videos to send by email. Gmail limits attachments to 25MB and most email services cap at 20-25MB. Our tool fits your video within these limits.
Related compression tools
Or compress FLV for a different platform