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Browser-based estimator

GIF size and upload limit calculator

Adjust dimensions, timing, and palette settings to estimate size and check common platform limits.

Enter GIF settings

The estimate updates immediately as values change.

Motion complexity
Estimated result
5.83MB

Estimated frames

75

Bits per pixel

6 bit

Compression factor

0.45

This is an estimate, not an exact file size

Actual size depends on content, palette construction, dithering, frame differences, and the encoder.

Estimation model

sizeframes × width × height × (log₂(colors) / 8) × factor

Frames = duration × fps. Conversion uses 1 MB = 1,000,000 bytes.

Platform limit check

Statuses use the current estimate. Platforms can change their rules, so recheck the linked official source before publishing.

X mobile

5 MB
About 0.83 MB over

Animated GIF upload limit

X Help

X web

15 MB
Estimated to fit

Animated GIF upload limit

X Help

Discord Nitro Basic

50 MB
Estimated to fit

Per-file upload limit

Discord Support

Imgur

200 MB
Estimated to fit

Animated image limit; over 2 MB converts to GIFV

Imgur Help

Slack

1 GB
Estimated to fit

General file upload limit

Slack Help

WhatsApp

2 GB (file sharing)
Estimated to fit

Official general file limit, not an inline GIF guarantee

Meta Newsroom

Microsoft Teams

250 GB (file sharing)
Estimated to fit

Teams files use SharePoint or OneDrive

Microsoft Learn

Reddit

Check at upload
Check on platform

No stable global GIF cap is published; community and client rules vary

Reddit Help

Verified August 6, 2026. A general file limit does not guarantee inline GIF playback, and workspace, community, client, or admin policies may impose lower limits.

How to get under the limit

Each target assumes one change at a time. For complex footage, combining two changes is usually safer.

Target: under X mobile's 5 MB

These values are derived from the current model. Check the exported file before uploading.

Reduce frame rate to

12 fps

Resize to

592 × 332 px

Reduce colors to

16 colors

Trim duration to

4.2 sec

Frequently asked questions

How accurate is this GIF size estimate?+

It is useful for comparing settings before export, but it cannot replace a real encode. Frame differences, local palettes, dithering, and the encoder all affect final size.

Why does motion complexity affect file size?+

GIF LZW compression benefits from repeated pixel patterns. Static backgrounds compress better, while fast motion, noise, and dithering create more changing data.

What is the most effective way to shrink a GIF?+

Reduce dimensions first, then lower frame rate or duration. Fewer colors also help, but can be more visible in gradients and detailed scenes.

Why is an MP4 usually smaller than the same GIF?+

Modern video codecs predict across frames and use more efficient compression. GIF has a limited palette and an older compression model, so longer animation is usually better as MP4.