What size GIF does X (Twitter) accept?

X documents a large animated GIF upload budget (commonly cited around 15MB) plus practical limits on dimensions and frame count. Those rules can change—check X’s current help docs and verify with a test post. Resize and compress so you are comfortably under both bytes and pixels.

Why did my GIF fail on X even under the file size limit?

Posts can fail when width × height × frames is extreme, or when dimensions are far past what the timeline needs. Shrink width, shorten the loop, then compress.

Does ReduceGIF upload my GIF to a server?

No. Compress and resize run locally in your browser.

How to Compress a GIF for Twitter / X

Posting an animated GIF on X (Twitter) fails for two common reasons: the file is too heavy, or the pixel/frame budget is extreme even when the byte size looks fine. Fix dimensions first, then compress.

Use ReduceGIF’s animated GIF compressor and resizer. We do not hard-code X’s limits here—confirm in X’s help center and with a draft post.

Fast answer

Resize so width matches timeline display (often 480–640px, not a raw 1280px export).
Optional: crop dead margins; shorten very long loops in your editor.
Compress Balanced → preview → download.
Draft-post on X; if it fails, reduce width or frames further.

Step-by-step for X posts

1. Inspect the source

Note width, height, frame count (if your editor shows it), and file size. Video-to-GIF exports are the usual offenders.

2. Resize for the timeline

Open the GIF resizer. Cap max width to something timeline-friendly. Keeping every pixel of a 1080p screen recording rarely helps engagement and often trips upload rules.

3. Crop if framing is wasteful

Crop letterboxing and idle edges so you are not shipping empty pixels across hundreds of frames.

4. Compress in the browser

Open the GIF compressor. Start Balanced. Preview the full loop—timeline autoplay makes flicker obvious. Download and keep the original.

5. Test as a draft or protected post

If X rejects the upload, shrink width again, cut duration in your source tool, then recompress. Do not only slam Smaller File at full resolution.

Compress Your GIF

Bytes vs pixels on X

X’s documented GIF rules have historically included a file size ceiling and practical caps on dimensions / frames / total pixels. Hitting only the megabyte number is not always enough.

Goal	Prefer
Smaller file	Resize → crop → compress
Fewer total pixels	Lower width/height or fewer frames
Cleaner look after post	Milder compress after a sensible resize

X may convert GIFs for playback. A clean, modest source usually looks closer to what you previewed locally.

Tips

Stay well under any published MB limit so encoding headroom remains.
Prefer short loops; long clips belong as video more often than GIF.
For format alternatives, see GIF to MP4 (offline)—ReduceGIF does not convert GIF→MP4 yet.
Privacy: processing stays on your device (compress without uploading).

Troubleshooting

Symptom	What to try
Upload fails under “size OK”	Reduce width / frame count
Soft after posting	Milder compress; avoid recompressing twice
Huge file after mild compress	Crop + resize first
Browser tab freezes	Resize the source before compressing