How to Reduce GIF File Size (Free Online Compressor)

Shrink animated GIFs for Discord, Twitter, Slack, or email. Browser-based compressor with platform presets and a target-size mode.

Quick Answer: How to Reduce GIF File Size (Free Online Compressor)

Open Gifur's GIF optimizer, choose a preset or enter a target size, then run the compression search. The tool adjusts colors, scale, frame rate, and duplicate-frame handling; inspect the result because platform limits and encoder output can vary.

Shrink GIFs to hit a target file size — Presets for Discord (8 MB), Twitter (15 MB), and Slack (500 KB), or aim at a custom size — the tool searches for the right quality settings automatically.

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No signup required. All processing happens in your browser.

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Key Facts

Why Use This Tool

Adjust dimensions, frame rate, and colors to trade quality for size
Aim for an exact size — the compressor sweeps quality settings to hit it
Presets for Discord (8MB), Twitter (15MB), Slack (500KB), email (1MB)
Runs locally within the tool’s file and browser-memory limits
No watermarks

What different platforms accept

•Discord free: 8MB · Nitro: 50MB
•Twitter/X: 15MB
•Slack inline preview: 500KB (larger uploads become a download link)
•Email: keep it under 1MB to be safe
•Reddit: 100MB · Telegram: 10MB
•iMessage: around 3MB is reliable across carriers

The three knobs that actually shrink a GIF

Dimensions, frame rate, and colour count are the main controls. Fewer pixels, frames, or palette colors can reduce output size, but the effect varies with the source animation. The Compressor lets you adjust all three and compare the result.

Ready to try it? Open the Optimize → It runs in your browser — nothing is uploaded.

Target-size mode

If you know the cap you need to hit, use the target-size preset. The Compressor runs a binary search across quality settings — it tries a few combinations and picks the one that lands just under the limit, so you don't have to fiddle with sliders.

When it makes more sense to convert

H.264 MP4 often stores photographic animation more efficiently than GIF. If the destination accepts video, compare the MP4 and GIF outputs for size, visual quality, autoplay, and looping behavior before publishing.

Continue editing with these complementary tools

GIF Resizer

Change GIF or image dimensions while preserving quality

Cut / Trim

Extract a portion by time or frame range

GIF to WebP Converter

Convert GIF to WebP for smaller file size

Video to GIF

Convert MP4, WebM, or other videos to animated GIF

Step-by-step walkthroughs and format comparisons

Compress a GIF under 8MB

Get a GIF under Discord, Twitter and Slack size caps.

Make a GIF for Discord

Hit Discord’s 8MB limit without wrecking quality.

GIF vs WebP

When animated WebP beats GIF, and when it does not.

Frequently Asked Questions

Last verified: September 2026