GIF Resizer
Resize animated GIF files online for free with a practical width-height workflow. Upload a GIF, adjust dimensions, lock or unlock aspect ratio, and export a resized animated GIF directly in your browser with no upload queue. This page is built for teams that need predictable delivery: support docs, social posts, product updates, onboarding guides, and chat workflows where oversized GIFs create friction.
Drop GIF file here or click to select
Supports animated .gif files
Adjust width/height with optional aspect-ratio lock
Max file size: 80MB
Multiple Formats
Supports MP4/WEBM/MKV/AVI and more
No Installation
Powered by FFmpeg.wasm, runs in browser
Full Quality Control
Customize CRF, resolution, codec parameters
What a GIF resizer does
A GIF resizer changes pixel dimensions while keeping the file as an animated GIF. It is different from a GIF compressor that mainly focuses on reducing size through frame rate and palette tradeoffs. Resizing is the first practical decision when the GIF simply does not fit where it will be used. Teams often need exact pixel targets for docs, CMS blocks, design systems, email layouts, or social cards. A dedicated resizer gives clearer control than repeatedly exporting from heavy desktop tools just to hit width and height requirements.
- Dimension-first workflowSet explicit width and height to fit platform requirements instead of relying on uncertain auto-scaling.
- Animated GIF output preservedThe output remains an animated GIF, so it still works where GIF behavior is required.
- Aspect ratio controlKeep proportions for safe scaling or unlock ratio when you need strict custom dimensions.
Core features
Focused on stable animated GIF resizing for day-to-day publishing tasks
Width and height inputs
Set numeric width and height directly for predictable results in docs, product changelogs, and social layouts.
Keep aspect ratio switch
Toggle proportional resizing on or off. When enabled, changing one dimension updates the other automatically.
Dimension validation
The tool validates that width and height are positive and stay under a safe upper bound before processing.
Animated GIF output
Resized results remain playable animated GIF files, not static images or unrelated video formats.
No upload processing
Resizing runs locally in your browser through FFmpeg.wasm, reducing privacy concerns for internal media.
-resized naming convention
Output files append a -resized suffix so teams can quickly distinguish originals from processed assets.
Why use this GIF resizer
When a GIF is too large for layout slots, too small for readability, or stretched by automatic rendering, resizing is the cleanest fix. This page keeps that operation explicit and repeatable.
How to resize GIF online
A clear six-step workflow for animated GIF resizing
Step 1 - Open the GIF resizer
Go to the resizer section and start without account setup or desktop installation.
Step 2 - Upload your GIF
Drag and drop a GIF file or pick one from local storage. The tool validates file type and size before processing.
Step 3 - Review source dimensions
Check original width and height so you can set a target size that fits your destination layout.
Step 4 - Set width and height
Enable keep-aspect mode for proportional scaling, or disable it for custom dimensions with full control.
Step 5 - Run resizing
Start processing and monitor progress in the UI. Validation catches invalid dimensions before execution.
Step 6 - Download resized GIF
Download the output file with a -resized suffix and verify playback in your target app or page.
Designed for repeat GIF delivery
Dimension control for docs, social, and product communication workflows
Resize controls
Width + Height
Explicit numeric target dimensions
Aspect handling
On / Off
Lock ratio or set custom values
Output format
Animated GIF
Playback behavior retained
What users say
How teams use GIF resizing in real publishing pipelines
Avery Long
Technical Writer
Our docs have fixed content widths, so random GIF dimensions break readability. This resizer lets me hit exact targets quickly without reopening design software.
Riku Tanaka
QA Specialist
I share many animated bug reproductions. The keep-aspect switch helps me resize for ticket systems while preserving motion clarity.
Camila Duarte
Growth Marketer
Social posts often need strict dimensions. The custom width-height path plus local processing made our campaign prep much faster.
GIF resizer FAQ
Common questions on dimensions, aspect ratio, and output behavior
Can this tool keep GIF animation after resizing?
Yes. The output remains an animated GIF file so playback behavior is preserved in supported environments.
How does keep aspect ratio work?
When enabled, changing width automatically updates height (and vice versa) to preserve the original proportion.
Can I set custom width and height manually?
Yes. Turn off keep aspect ratio to enter independent width and height values for strict layout requirements.
What dimension values are valid?
Both width and height must be positive integers greater than zero and within the safe maximum limit shown by the interface.
How is the resized file named?
The downloaded file keeps your original base name and appends -resized before the .gif extension.
Are GIF files uploaded during resizing?
No. Processing is local in your browser using FFmpeg.wasm, so source GIF files are not sent to a remote conversion server.
Resize your GIF and keep animation intact
Use this page for exact dimension control, then open related tools when you also need compression or GIF conversion workflows.