Free GIF Converter
One place to convert, compress, resize, crop, and edit any GIF — powered by FFmpeg WebAssembly running entirely inside your browser. No upload, no account, no watermark.
Drop GIF here or click to browse
Converts in your browser — nothing uploaded
How It Works
Choose your conversion or editing tool
Select the operation you need — convert GIF to MP4 or WebM for social media, compress a GIF to reduce file size, resize to specific pixel dimensions, adjust playback speed, reverse the animation, or crop to a new aspect ratio. Each tool is purpose-built for its task and launches instantly in the browser.
Upload your GIF file
Click the upload zone or drag your .gif file onto it. Files up to 50 MB are supported. The moment you select the file it is read directly into your browser's memory — no network request is made and no data is sent to any server at any point during the entire operation.
Download your result
Processing completes in 2–15 seconds depending on file size and the operation performed. The output file is ready to download directly to your device. For video conversions you receive a standard MP4 or WebM file ready to upload to any platform. For GIF operations you receive an optimized .gif file you can use anywhere.
Why Use an Online GIF Converter?
GIF is the oldest animated image format on the web, dating to 1987. Despite its age it remains ubiquitous — used in chat apps, social media reactions, marketing emails, developer documentation, and product demos. The problem is that GIF was never designed for today's web. Its per-frame LZW compression produces files that are 5–20× larger than equivalent MP4 video, its palette is capped at 256 colors per frame, and it carries no audio channel whatsoever. A versatile GIF converter lets you escape these constraints in seconds: convert to MP4 for social publishing, export to WebM for maximum browser compression, or compress and resize the GIF itself for fast web delivery.
The most common use case is converting GIF to a video format. Instagram, TikTok, YouTube Shorts, Facebook Reels, and LinkedIn video posts all require MP4 — they do not accept GIF uploads. If your animation lives as a GIF file, a converter is the only way to get it onto these platforms without recreating the animation from scratch. MP4 also compresses the same visual content 80–97% smaller than GIF, which directly improves page load speed and Core Web Vitals scores — Google's Lighthouse explicitly flags animated GIFs as a performance defect under the rule "Use video formats for animated content".
Beyond format conversion, a good GIF tool suite handles the editing tasks that arise before or after conversion. Compression reduces file weight for email attachments and web embeds that must stay as GIFs. Resizing fits a GIF to a specific canvas — a 1:1 square for Instagram feed posts, a 9:16 crop for Stories, or a small thumbnail for a documentation page. Speed adjustment lets you slow a fast-action GIF for clarity or speed it up for comedic timing. Reverse creates a boomerang-style loop from any animation. Having all these operations in one browser-based tool eliminates the need to install desktop software or trust files to cloud services.
Privacy is a growing concern with online file tools. Many converters upload your files to remote servers, process them there, and store them indefinitely. This tool takes the opposite approach: every operation runs inside your browser tab using FFmpeg compiled to WebAssembly. Your GIF is never transmitted over the network. It never touches a server. It never appears in a processing queue visible to third parties. This makes the tool suitable for confidential product screenshots, internal company materials, or any animation you would prefer to keep private.
Key Features
GIF to MP4, WebM, APNG
Convert any GIF to the format you need. MP4 for social platforms, WebM for maximum browser compression, APNG for lossless animated images with alpha transparency.
GIF Compressor
Reduce GIF file size by up to 70% while preserving acceptable quality. Ideal for email attachments, chat embeds, and web pages with strict file size budgets.
Resize and Crop
Resize a GIF to exact pixel dimensions or crop it to a specific aspect ratio — 1:1 for Instagram, 9:16 for Stories, 16:9 for widescreen embeds, or any custom size.
Speed and Reverse
Double the speed for a punchy loop, slow it down for clarity, or reverse the entire animation for a boomerang effect. Frame timing is recalculated precisely.
100% Private — No Upload
Every tool in this suite runs entirely inside your browser using FFmpeg WebAssembly. Your files never leave your device and never touch any server.
No Installation Required
Works on Chrome, Firefox, Safari, and Edge on desktop, Android, and iOS. No app, no extension, no account. Open the page and start converting immediately.
Format Comparison
| Property | GIF | MP4 (H.264) | WebM (VP9) |
|---|---|---|---|
| Typical file size (5s, 480px) | 4–12 MB | 150–400 KB | 100–300 KB |
| Color depth | 256 colors (8-bit indexed) | 16.7 million (24-bit) | 16.7 million (24-bit) |
| Compression method | LZW per-frame (lossless) | H.264 inter-frame (lossy) | VP9 inter-frame (lossy) |
| Alpha transparency | 1-bit (on/off) | No | Yes (full 8-bit) |
| Audio support | None | Yes (AAC, MP3) | Yes (Opus, Vorbis) |
| Social platform support | Limited (web only) | Universal | Web browsers only |
| Core Web Vitals impact | Penalized (LCP) | Neutral to positive | Neutral to positive |
Technical Details
Every tool in this suite is powered by FFmpeg compiled to WebAssembly (Wasm) — the same FFmpeg binary used in professional broadcast and post-production pipelines, executing entirely inside a browser sandbox with no server involvement. WebAssembly allows near-native execution speed for CPU-intensive tasks like video codec encoding and image frame manipulation. When you submit a GIF for any operation, the Wasm binary reads the GIF's frame index table, decodes each frame into raw RGBA pixel data, applies the requested transformation (encode to H.264, compress palette, scale dimensions, reverse frame order, retime frame delays), and writes the output file — all within the browser's sandboxed memory space.
For video conversions, the decoded frames are fed into libx264 (for MP4) or libvpx-vp9 (for WebM). Both codecs use inter-frame compression: rather than storing each frame independently like GIF's LZW approach, they store only the pixel differences between consecutive frames. Because most looping animations share large regions of static pixels across frames, these differences are tiny, which is why the output file is 80–97% smaller than the source GIF. The MP4 output uses the yuv420p pixel format with -movflags +faststart so that the container metadata sits at the start of the file, enabling instant playback streaming before the full file downloads.
For GIF operations such as compression and resize, FFmpeg applies palette re-quantization and Lanczos scaling respectively. Palette re-quantization recalculates the optimal 256-color palette for the entire animation, reducing dithering artifacts and enabling better LZW compression at smaller file sizes. Lanczos scaling is a high-quality resampling algorithm that preserves sharpness when downscaling pixel art and photographic GIFs alike. Speed adjustment works by multiplying each frame's delay value in the GIF timing table — a 2× speed increase halves every frame delay, a 0.5× slowdown doubles them. Reverse simply writes the decoded frame array in reverse order before re-encoding.