Compress Video for Instagram (4 GB Limit)

Instagram caps uploads at Reels 4 GB, Feed video 4 GB, Stories 4 GB. VidSmaller compresses any video down to 100 MB so it fits on the first attempt — H.264 MP4 out, no watermark, nothing to install, no account needed to try it. Cloud encoding keeps running if the tab closes. The no-account trial accepts videos up to 3 minutes and 200 MB; paid plans accept files up to 1.5 GB.

Instagram will accept a 4 GB file, so file size is almost never why your upload failed. The reason your Reel looks worse than the file on your laptop is that Instagram re-encoded it, and what you hand their encoder decides how much survives.

Instagram file size limits, and what they really mean

Reels, feed video and Stories all accept up to 4 GB. That number is a red herring. Instagram re-encodes every upload to its own ladder, so the useful question is what gives their encoder the least work to do: a clean 1080x1920 H.264 file at 8 to 12 Mbps. Hand them a 3 GB master and their encoder crushes it far harder than it crushes a well-prepared 100 MB file.

Plan / upload methodMaximum file size
Reels4 GB

The 4 GB cap is almost never what stops you. Instagram re-encodes everything you upload, so a bloated file just gets crushed harder by their encoder — you get a better result by handing them a clean 1080x1920 H.264 file at 8–12 Mbps than by uploading your 3 GB master.

Feed video4 GB
Stories4 GB

Up to 60 seconds per slide. Instagram stopped chopping sub-60-second videos into 15-second segments in September 2022 — any guide still describing that split, including an earlier version of this page, is stale.

Limits verified 2026-09-14. Sources: Instagram — Reel size & aspect ratios · TechCrunch — Instagram Stories under 60 seconds are no longer broken up into clips (23 Sep 2022)

What 100 MB actually buys you

Every other page tells you the limit and stops there. The limit is the easy half. Here is the half that decides whether your video is watchable: at a 100 MB target, this is exactly how much bitrate is left for each duration, and the largest resolution that bitrate can carry without falling apart.

Video lengthBitrate left for videoResolution it carriesVerdict
15s54,678 kbps4KLooks fine
30s27,275 kbps4KLooks fine
1 min13,573 kbps1440pLooks fine
2 min9,006 kbps1440pLooks fine
3 min4,439 kbps1080pLooks fine

Method: the bitrate column is arithmetic — 100 MB spread across the duration, minus 128 kbps for stereo audio and 2% for container overhead. It is a hard ceiling, not an estimate. The resolution and verdict columns are a recommendation, derived from published H.264 bitrate ladders and pulled down about a third, because re-encoding footage that has already been compressed once survives lower bitrates than encoding a clean master does. Deliberately conservative — we would rather under-promise than tell you a video will look fine when it will not.

100 MB across lengths and resolutions

The left column is what you have to spend at each length; the cells are what each resolution needs. Green means you clear it comfortably, amber means it is watchable but soft, and grey means pick a smaller frame. Reading down a column shows how long a clip can get before that resolution stops being worthwhile on Instagram.

you haveneeded for comfortable quality1080p720p480p360p15s54,67815s at 1080p: 54678 kbps available; 4000 kbps for a comfortable result, 2000 kbps to stay watchable4,00015s at 720p: 54678 kbps available; 2200 kbps for a comfortable result, 1100 kbps to stay watchable2,20015s at 480p: 54678 kbps available; 1000 kbps for a comfortable result, 500 kbps to stay watchable1,00015s at 360p: 54678 kbps available; 600 kbps for a comfortable result, 300 kbps to stay watchable60030s27,27530s at 1080p: 27275 kbps available; 4000 kbps for a comfortable result, 2000 kbps to stay watchable4,00030s at 720p: 27275 kbps available; 2200 kbps for a comfortable result, 1100 kbps to stay watchable2,20030s at 480p: 27275 kbps available; 1000 kbps for a comfortable result, 500 kbps to stay watchable1,00030s at 360p: 27275 kbps available; 600 kbps for a comfortable result, 300 kbps to stay watchable6001 min13,5731 min at 1080p: 13573 kbps available; 4000 kbps for a comfortable result, 2000 kbps to stay watchable4,0001 min at 720p: 13573 kbps available; 2200 kbps for a comfortable result, 1100 kbps to stay watchable2,2001 min at 480p: 13573 kbps available; 1000 kbps for a comfortable result, 500 kbps to stay watchable1,0001 min at 360p: 13573 kbps available; 600 kbps for a comfortable result, 300 kbps to stay watchable6001.5 min9,0061.5 min at 1080p: 9006 kbps available; 4000 kbps for a comfortable result, 2000 kbps to stay watchable4,0001.5 min at 720p: 9006 kbps available; 2200 kbps for a comfortable result, 1100 kbps to stay watchable2,2001.5 min at 480p: 9006 kbps available; 1000 kbps for a comfortable result, 500 kbps to stay watchable1,0001.5 min at 360p: 9006 kbps available; 600 kbps for a comfortable result, 300 kbps to stay watchable6003 min4,4393 min at 1080p: 4439 kbps available; 4000 kbps for a comfortable result, 2000 kbps to stay watchable4,0003 min at 720p: 4439 kbps available; 2200 kbps for a comfortable result, 1100 kbps to stay watchable2,2003 min at 480p: 4439 kbps available; 1000 kbps for a comfortable result, 500 kbps to stay watchable1,0003 min at 360p: 4439 kbps available; 600 kbps for a comfortable result, 300 kbps to stay watchable600

Source: Computed, not measured — no encoder was run to produce this figure · Method: 100 MB spread over the duration, minus 128 kbps audio and 2% container overhead. Thresholds come from published H.264 bitrate ladders, reduced by about a third for re-encoded source.

How to compress a video for Instagram

  1. Drop your video in

    MP4, MOV, MKV, AVI, WebM and 33 formats in all. Nothing to install — your browser uploads over a one-time link and the file never touches a third party.

  2. The target is already 100 MB

    We pre-set it below the hard ceiling on purpose. A target-size encode usually lands within a couple of percent of the number you gave it, but we have measured footage that overshoots by up to a tenth — and landing over a hard limit means the upload fails. Change it if you want a different number.

  3. Download and upload

    Encoding runs on our servers, so you can close the tab. The result comes back with no watermark on any plan, in an MP4 that Instagram will accept.

Instagram compression FAQs

What is the Instagram video size limit?

4 GB for Reels, feed video and Stories. Duration is the tighter constraint in practice — Reels run to about 3 minutes, and Stories allow 60 seconds per slide. If you have read that Stories chop your video into 15-second segments, that stopped being true in September 2022. Very few people ever hit 4 GB.

Why does my Reel look blurry after uploading?

Instagram re-encodes everything, and its encoder makes worse decisions when you give it a harder problem. Uploading a huge, high-bitrate master does not preserve quality — it means their encoder has to throw away more, and it does that with no regard for what you cared about. A 1080x1920 H.264 file at around 10 Mbps gives their pipeline almost nothing to do, and that is what survives best.

What resolution should I upload to Instagram?

1080 x 1920, 9:16, at 30fps. Higher does not help: Instagram downscales anything above 1080p wide, so uploading 4K just means your footage gets scaled and re-encoded rather than only re-encoded. Use 60fps only if the content genuinely has fast motion, because doubling the frame rate halves the bitrate available to each frame.

Should I compress before uploading to Instagram?

Yes, and it is one of the few places where compressing improves the final result rather than just shrinking the file. Getting your export to 1080x1920 at 8 to 12 Mbps before uploading means Instagram’s encoder has almost no work left to do, so it makes fewer destructive decisions on your behalf.

The reasoning behind these numbers

OTHER LIMITS
Same tool, a different upload ceiling