Reduce the largest drivers of animation weight—pixel area and frame count—without flattening motion. Frames are decoded locally, resized consistently, optionally sampled with skipped delays merged, and remuxed as a real animated WebP with the original loop count.
How to use Animated WebP Compressor
- Choose an animated WebP and confirm its frame count, dimensions, and timing are within the displayed browser safety limits.
- Set an output scale and decide whether to retain every frame or sample every second, third, or fourth frame.
- Create the optimized animation, compare dimensions, frames, and measured bytes, then preview it in the intended destination.
What this tool is good at
When to use Animated WebP Compressor
Make a precise animation optimization decision
Reduce pixel area and, when appropriate, sample frames in a heavy animation intended for web playback. The result is based on the selected file's actual bytes or decoded frames, so it can support a concrete publishing or engineering decision instead of a filename-based assumption.
Troubleshoot a private production asset
Use the browser-local workflow for client images, unreleased campaigns, product media, or internal fixtures when sending the source to a generic third-party utility would create unnecessary exposure.
Document repeatable asset checks
Keep the generated output or JSON report with a ticket, content review, or migration record. Preview motion after every frame-sampling change; measured byte savings do not compensate for unacceptable timing or lost action. This makes the finding reproducible for another editor or developer.
How to choose the right settings
Start from the intended destination
Preview motion after every frame-sampling change; measured byte savings do not compensate for unacceptable timing or lost action. Choose settings or interpret results in the context of the actual CMS, browser, editor, size budget, animation player, or privacy policy that will consume the WebP.
Separate container facts from visual judgment
RIFF chunks, dimensions, alpha values, and encoded bytes answer technical questions, while perceived sharpness, acceptable motion, and brand appearance still require a human preview at the real display size.
Retain the authoritative original
Frame sampling deliberately changes smoothness, metadata is not retained, and an already optimized source is not guaranteed to become smaller. Keep the source until the derivative or report has been reviewed, downloaded, and tested in the destination workflow.
Practical workflow and output details
Every retained frame is decoded, proportionally resized, assigned merged timing when frames are skipped, and remuxed through the lazy WebAssembly codec. File bytes remain in the current browser tab; only static application code or codec assets are fetched, and no image-processing request is sent to PicConverters.
Frame sampling deliberately changes smoothness, metadata is not retained, and an already optimized source is not guaranteed to become smaller. The tool reports or changes only the scope named on the page and avoids implying broader repair, anonymity, visual quality, or cross-application compatibility than the operation can establish.
Format behavior and limitations
Frame sampling changes motion smoothness even though skipped frame delays are merged into retained frames; use it only after previewing playback.
The current muxer writes freshly encoded frames and strips container metadata. Scale reduction usually helps, but a smaller output is not guaranteed for an already optimized source.
Frequently asked questions
Does this only compress the first frame?
No. Every retained frame is decoded and written into a new animated WebP; still input is rejected.
What does every second frame do?
It retains frame 1, 3, 5, and so on, while adding skipped delays to the retained timing so the overall duration remains close to the source.
Will transparency remain?
Decoded alpha pixels are preserved through resizing and animation encoding, although edge pixels can change because scaling resamples them.
Related WebP tools
WebP Frame Extractor
Decode every complete frame from an animated WebP and download lossless numbered PNG files with frame delays.
WebP Quality Changer
Re-encode static WebP images at a deliberate quality level and compare genuine output size before downloading.
WebP Animation Checker
Check whether WebP files are animated and report frame count, loop count, total duration, frame rectangles, delays, blending, and disposal.