How to convert video to animated webp for signal
- Step 1Go offline if the clip is sensitive (optional) — Once this page has loaded, conversion needs no network — FFmpeg.wasm runs locally. For maximum assurance with private media, disconnect from the network before dropping the file. The encode still completes entirely on your device.
- Step 2Trim to the moment worth sharing — Signal shares are usually a quick clip, not a long video. Trim to the key seconds with lossless-trimmer (stream-copy, no re-encode) so the WebP is small and sends fast on mobile data.
- Step 3Drop the clip onto the converter — The picker accepts mp4, mov, mkv, webm, avi, m4v, and ts. The clip is read into browser memory and decoded locally — it never touches a server. One file per run.
- Step 4Set Width for a chat-friendly size — Set Width to 480–720 for an inline chat loop (height auto-scales to the source aspect). Smaller width = fewer bytes for the recipient to download. For a square sticker-style loop, crop to 1:1 first with video-cropper.
- Step 5Pick FPS and Quality for size — FPS 15–24 keeps a chat loop smooth without bloating it. Quality 75–85 is the sweet spot — small enough for mobile data, clean enough to look good. Drop to 70 if you want it tiny.
- Step 6Run and share in Signal — Click Run; the looping
.webpdownloads. Attach it in a Signal chat — Signal renders animated WebP inline so it plays in the conversation. The whole round-trip happened on your device.
Signal-friendly settings by goal
Starting points for clips shared in Signal chats. Smaller files are kinder to the recipient's mobile data.
| Goal | FPS | Width | Quality |
|---|---|---|---|
| Quick inline chat loop | 15–20 | 480 | 78–82 |
| Sharper, larger share | 24 | 720 | 82–88 |
| Tiny / low-data send | 12–15 | 320 | 70 |
| Square sticker-style loop | 20–24 | 512 (crop to 1:1 first) | 80 |
Why local conversion matters for Signal users
The privacy properties of this converter, grounded in how it actually runs.
| Property | This converter | Typical web converter |
|---|---|---|
| Where the clip is processed | In your browser (FFmpeg.wasm) | Uploaded to a remote server |
| Network needed to convert | None after page load (works offline) | Required (upload + download) |
| What's stored about the clip | Nothing — only an anonymous processed counter (if signed in) | Often the file, logs, or both |
| Fit with Signal's model | End-to-end local, no leak | Defeats the privacy purpose |
Cookbook
Real Signal-share conversions tuned for small, private, inline loops. Convert offline if the media is sensitive.
Quick inline chat loop, kept small
A 2-second clip to drop into a Signal chat. Small width and modest FPS keep it light so it sends fast and doesn't eat the recipient's data.
Source: clip.mp4 (2.0s, 1080p, 30fps) Controls: FPS 18 · Width 480 · Quality 80 FFmpeg (libwebp): -vf fps=18,scale=480:-1:flags=lanczos -loop 0 -q:v 80 -an → chat.webp 480×270, looping ~340 KB Signal renders it inline — plays in the conversation.
Convert offline for sensitive media
A private clip you'd rather not have touch any network. Because FFmpeg.wasm runs locally, you can disconnect first and still convert.
1. Load this page (one time, online) 2. Turn off Wi-Fi / mobile data 3. Drop the clip → set FPS 20 · Width 480 · Quality 80 → Run 4. WebP saved locally, no byte ever left the device 5. Reconnect only to send it in Signal The encode completes fully offline.
Square sticker-style loop for Signal
Signal's sticker packs use fixed sizes; for a square-ish loop, crop to 1:1 first, then convert at 512px.
1. video-cropper → crop centre to 1:1 (e.g. 720×720) 2. video-to-webp → FPS 24 · Width 512 · Quality 80 → 512×512 looping WebP Use as a square inline loop, or as the basis for a Signal sticker (sticker packs have their own size rules).
Tiny send for poor connectivity
Sending on a weak mobile connection. Drop width, FPS, and quality together for the smallest watchable loop.
Source: moment.mp4 (3.0s) FPS 24 · Width 480 · q82 → 520 KB FPS 15 · Width 320 · q70 → 150 KB (low-data send) Still clearly watchable inline; a third of the bytes over a flaky connection.
Smaller and cleaner than the GIF you'd otherwise send
The same loop as a GIF vs WebP. WebP is both smaller and free of GIF's dithering — better for the recipient on every axis.
Source: react.mp4 (2.5s, 480px) GIF → 1.4 MB (256-colour, dithered) WebP → 0.45 MB (FPS 18, q80, full colour) ~3× smaller and cleaner. Signal renders both, but WebP is the better citizen on mobile data.
Edge cases and what actually happens
Does the clip leave my device at all?
Stays localNo. The converter reads the file into browser memory and runs FFmpeg.wasm locally — no upload, no server round-trip. It even works offline after the page loads. The only thing recorded server-side (if you're signed in) is an anonymous processed-file counter with no content. This is the right tool for Signal-grade privacy.
Recipient on an old Signal client doesn't see the animation
Client supportAnimated WebP renders inline on current Signal across platforms, but a very old client could fall short. If a recipient reports a still image, ask them to update Signal, or send a GIF instead via video-to-gif for the widest fallback. The file from this tool is standard animated WebP either way.
Audio in the clip you're sharing
Stripped (by design)WebP carries no audio and the encoder runs -an, so the soundtrack is dropped. For a quick visual share that's usually fine (and sometimes a feature). If the audio is the point, send the original clip as a Signal file attachment instead of converting to WebP.
Loop is heavy on mobile data
Shrink itBe kind to the recipient's data: drop Width first (it scales bytes with area), then FPS, then quality. A 320px / 15 FPS / q70 loop is a fraction of a 720px / 24 FPS / q85 one and still perfectly watchable inline. Trim duration with lossless-trimmer too.
Wanting a square loop from a 16:9 clip
Crop firstThis tool only scales by width, so a 16:9 source becomes a 16:9 WebP (e.g. 480×270). For a square inline loop or sticker base, crop to 1:1 with video-cropper before converting — there's no pad/aspect-fill control here.
Loop plays once instead of repeating
Always loopsThis won't happen — -loop 0 is hardcoded, so every WebP loops infinitely and plays continuously in Signal. There's no loop-count field to misconfigure.
File exceeds your tier's size limit
413 tier limitGating is by file size, not duration: Free 1 GB / 1 file; Pro 10 GB / 5 files; Pro-media 100 GB / 50 files; Developer 100 GB / unlimited. A chat clip is tiny, so this only bites on giant raw sources — trim first with lossless-trimmer.
Decode fails on an unusual container
WebP encode failedAccepted inputs are mp4, mov, mkv, webm, avi, m4v, and ts; other extensions are read as MP4 and may fail. A 'WebP encode failed' error means FFmpeg.wasm couldn't decode the stream — re-wrap to a clean MP4 with video-transcoder and retry.
Frequently asked questions
Does Signal show animated WebP inline?
Yes — current Signal clients render animated WebP inline in chats, so a looping .webp plays right in the conversation. A very old client might show a still frame; if a recipient reports that, ask them to update Signal or fall back to a GIF.
Is my clip uploaded anywhere when I convert it?
No. The converter runs entirely in your browser via FFmpeg.wasm — the clip is read into memory and encoded locally, never sent to a server. It even works offline after the page loads. That's exactly the privacy property a Signal user wants. Only an anonymous processed-file counter is recorded if you're signed in.
Can I convert with no internet connection?
Yes — once this page has loaded, conversion needs no network. For sensitive media, you can disconnect from Wi-Fi and mobile data, convert locally, and only reconnect to send the result in Signal. The whole encode happens on your device.
What settings make the smallest file for sending?
Lower Width first (it scales bytes roughly with area), then FPS, then Quality. A 320px / 15 FPS / quality 70 loop is a fraction of the bytes of a 720px / 24 FPS / 85 one and still clearly watchable inline — ideal for a poor mobile connection. Trim the clip's duration too.
Why is the audio gone from my converted clip?
WebP can't carry audio and the encoder strips it with -an. For a quick visual share that's usually fine. If the audio matters, send the original clip as a Signal file attachment instead of converting to WebP.
Can I make a Signal sticker from a video here?
You can produce the animated WebP loop, and for a square sticker-style result, crop to 1:1 first with video-cropper and convert at 512px. Signal's dedicated sticker packs have their own creation flow and size rules — this tool gives you the looping WebP to start from.
What input formats can I drop in?
video/* plus .mp4, .mov, .mkv, .webm, .avi, .m4v, and .ts. Unrecognised extensions are read as MP4 and may fail to decode — re-wrap to MP4 first if you hit an error.
Will the loop repeat in Signal or play once?
It repeats. The encoder always sets -loop 0 (infinite loop), so the WebP plays continuously in the conversation. There's no loop-count setting to change.
Is WebP or GIF better to send on Signal?
WebP — it's typically 25–35% smaller with cleaner colour, so it's kinder to mobile data and looks better. Use video-to-gif only as a fallback for a very old recipient client that doesn't render animated WebP.
How large a clip can I convert?
Gating is by file size, not duration: Free 1 GB / 1 file; Pro 10 GB / 5 files; Pro-media 100 GB / 50 files; Developer 100 GB / unlimited. A Signal share is small, so just trim long sources with lossless-trimmer to keep the send light.
What size should the loop be for a chat?
480–720px width works well for an inline chat loop; height auto-scales to your source aspect. Go to 320px for low-data sends. For a square loop, crop to 1:1 first and convert at 512px.
Does converting degrade the clip?
It's lossy WebP, so there's some compression, but at quality 80+ it looks clean on a chat-sized loop — and far cleaner than the GIF alternative. For maximum fidelity push quality to 90–95; for a tiny send drop to 70. Start from the best source you have.
Privacy first
Every JAD Video tool runs entirely in your browser via WebCodecs and FFmpeg (WebAssembly). Your video files never leave your device — verified by zero outbound network requests during processing.