⚙️ WasmTools

Optimize GIF Online Free — Shrink GIF File Size

Free online GIF optimizer: compress GIF file size for Discord, Slack, or the web — with an optional downscale. Runs entirely in your browser, no upload.

🔒 Runs entirely in your browser — your files never leave your device.

About GIF Optimizer

GIFs get heavy fast — especially screen recordings and memes saved from other apps. This optimizer re-encodes the animation with a freshly computed palette (and can downscale it), which typically cuts the file size substantially. The GIF is processed locally and never uploaded.

How to use GIF Optimizer

  1. Drop a GIF file into the upload area.
  2. Optionally pick a smaller output size (75% or 50%).
  3. Click Process GIF and download the slimmer result.

Frequently asked questions

Is this GIF optimizer really free?

Yes — free with no account, no watermark, and no limits.

How much smaller will my GIF get?

It depends on the content, but 20-60% reductions are typical — more if you also downscale. The size before and after is shown next to the download.

Does optimization reduce quality?

GIFs are limited to 256 colors either way; re-encoding recomputes the palette, which can slightly shift colors. Downscaling reduces resolution. Preview the result before using it.

Which size limits can this help with?

Common ones: Discord's 8 MB free-tier limit, Slack's preview limits, and email attachment caps. Downscale to 50% if you need to get under a tight limit.

Are my files uploaded to a server?

No. All processing happens locally in your browser using WebAssembly. Your files never leave your computer — close the tab and nothing remains.

Related tools

AVIF to JPG Converter

Convert AVIF images to JPG online for free, even if your browser can't open AVIF.

runs locally

AVIF to PNG Converter

Convert AVIF images to lossless PNG online for free, preserving transparency.

runs locally

Background Remover

Remove the background from any photo with an AI that runs entirely in your browser.

runs locally

Barcode & QR Scanner

Read QR codes and barcodes (EAN, UPC, Code 128, and more) from image files — entirely in your browser.

runs locally

EXIF Metadata Viewer

View the hidden metadata in your photos — camera, date, and GPS location — entirely in your browser.

runs locally

GIF to Frames

Split a GIF into individual frames and download them as PNG files.

runs locally