Free GIF Resizer

Scale any animated GIF to a new width. Aspect ratio is preserved automatically across every frame. No upload, no account — runs entirely in your browser.

100% PrivateNo UploadFree

ResizeFREE

Browser-side • No upload

Drop GIF here or click to browse

Converts in your browser — nothing uploaded

How It Works

Load your GIF

Drag your animated GIF into the tool or click the file picker to select it from your device.

Enter the target width

Type your desired output width in pixels. The height field updates automatically to maintain the original aspect ratio.

Download the resized GIF

Click Resize. Every frame is scaled using bicubic interpolation in your browser. Review the new dimensions, then save the file.

Why Resizing a GIF Makes Such a Big Difference

GIF file size does not shrink linearly with dimensions — it shrinks with the square of the dimension ratio. Reducing a GIF's width by half cuts the canvas area to one quarter. A 1200 px wide GIF resized to 600 px does not lose half its bytes; it typically loses 60–75% of them. This makes dimensional resizing the single highest-leverage optimization available for oversize animated GIFs, delivering reductions that lossy compression alone cannot match.

Platforms impose their own maximum display widths, and they do not warn you when your GIF exceeds them. When a browser renders an 1800 px wide GIF inside a 640 px column, it downloads every single extra pixel and discards them during layout. You pay the bandwidth cost, but the viewer gets nothing in return. Resizing to the actual display width eliminates that waste entirely — for every user who views the GIF.

Retina (2x) exports from design tools like Figma, Sketch, or Framer are another common source of oversized GIFs. A design intended to display at 400 px is exported at 800 px for high-DPI clarity. On standard 1x screens — still the majority of devices globally — serving the 800 px version wastes exactly half the bytes. Resizing to the 1x width produces a file that looks identical on standard screens while halving the download size.

Aspect ratio locking is not just a convenience — it is essential for animation quality. Each frame of an animated GIF must share identical canvas dimensions. If even one frame were resized with a slightly different height calculation due to rounding, the result would stutter or shift on certain GIF renderers. This tool applies consistent proportional scaling — using the formula new_height = round(original_height × new_width / original_width) — across every frame simultaneously.

Key Features

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Screen recording exports

Screen capture tools default to full monitor resolution, often producing GIFs at 1920 px or wider. Resizing to 800 px — the standard width for documentation and blog posts — typically reduces these from 20–50 MB to a manageable 2–6 MB.

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Retina to standard conversion

Resize a 2x export to exactly 50% of its exported dimensions to serve an optimally sized file on standard displays, without sacrificing quality on high-DPI screens that receive the original.

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Email-safe widths

Email clients render images inside containers typically 500–600 px wide. Any GIF wider than that is scaled down by the client — after you have already paid for the extra bytes to be downloaded. Pre-sizing prevents this waste.

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Gallery thumbnail generation

A gallery grid showing animated previews at 200 px should serve GIFs at 200 px, not scale down a 1200 px source in CSS. Correct-sized thumbnails load faster and consume less memory in the viewer's browser.

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Platform-specific sizing

Discord animated server icons display at 96 px. Twitter cards render GIFs at 800 px. GitHub README columns sit at 640 px. Resizing to the exact platform dimension means zero wasted bytes on delivery.

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Private, offline-capable processing

Resizing runs in WebAssembly inside your browser tab. Your GIF is never transmitted to any server. The tool works even when your internet connection is unreliable — once the page loads, no further network access is needed.

Format Comparison

Platform or Use Case	Recommended Width	File Size Limit	Notes
Twitter / X	800 px	15 MB	Maximum inline display width in the timeline
Discord (free account)	480 px	8 MB	Animated server icons must be 96 px and under 256 KB
Slack	480 px	1 GB	GIFs preview inline as thumbnails; smaller loads faster
GitHub README	640 px	10 MB	Fits within the default README column width
Blog or website article	Match column width	No platform limit	Typically 600–800 px for standard content columns
Email newsletter	600 px	~1 MB recommended	Most clients render a maximum width of 600 px

Frequently Asked Questions

Does resizing affect animation timing or loop count?

No. Every frame is scaled proportionally, but all frame delay metadata is preserved without modification. Animation speed, frame count, and loop behavior remain exactly as they were in the original. Only the pixel dimensions change.

Can I make a GIF larger by resizing it up?

You can scale up, but upscaling does not recover detail that was not in the original. Bicubic interpolation estimates the color of new pixels by blending neighboring ones, which produces a soft or slightly blurry result. For modest increases — 10 to 20% — the blurriness is usually acceptable. For large upscales, the result will look noticeably soft.

Why does the resized file sometimes end up larger than the original?

Bicubic interpolation blends neighboring pixels, which can introduce color values that were not present in the original palette. More unique colors require more palette entries and compress less efficiently under LZW. If this happens, run the resized GIF through the GIF Compressor afterward — palette re-optimization on the new pixel values usually brings the size back down.

Can I set width and height independently to change the aspect ratio?

This tool resizes by width with height calculated automatically to preserve the original aspect ratio. Setting arbitrary width and height independently would stretch or squeeze every frame of the animation, distorting the content. If you need to change the aspect ratio by removing pixels rather than stretching them, use the GIF Cropper instead.

How small can I resize a GIF?

There is no enforced minimum width, but very small dimensions — below 50 px — will look blocky at typical viewing sizes due to the limited pixel count. If you need a tiny thumbnail for display but a larger version for other uses, keep both files: the resized thumbnail for fast loading and the original for full-size display.

Does this work without an internet connection?

Once the page has fully loaded, all processing happens locally in your browser using WebAssembly. No network connection is required to resize a GIF after the initial page load. This also means your files remain completely private — nothing is ever uploaded.