SMALLER WEBM FILES

Compress WebM Online

Reduce WebM file size for web delivery, storage or transfer with a focused VP9 compression workflow.

✓ WebM in, WebM out✓ VP9 output✓ Optional resolution limit

✓ No account required✓ Live progress✓ Automatic cleanup

Converter readyUp to 400 MB per request • 250 MB per file

250 MB per file400 MB per request45 min max video~30 min auto-delete

Drop WEBM files here or click to browse from your device No files selected MP4, MOV, MKV, AVI, WebM, MP3, WAV, FLAC, M4A, AAC, OGG, OPUS + more

Convert to Recommended MP4 is recommended for broad video compatibility.

Output quality

Highlarger file Balancedrecommended Smallermore compression

Smart output: MP4Best overall compatibility for video playback and sharing.

Size depends on source

Compression settingsFine-tune the output

Maximum resolutionNever intentionally upscales; server limit: 1080p. Audio bitrateUsed by compressed audio outputs and video audio tracks. Sample rate48 kHz is common for video production. Output filename

.mp4

Available for single-file conversion. Trim startOptional HH:MM:SS or seconds. Trim endLeave blank to convert to the end. Remove audioCreate silent video output.

✓ Format-aware settings✓ Live queue progress✓ Files expire after ~30 min

WHY USE THIS TOOL

Optimize WebM without switching containers

When WebM is already the right format, compression and resolution are the useful controls—not another format decision.

Keep WebM

Stay in a browser-friendly WebM workflow.

VP9 encoding

The exporter uses VP9 video with Opus audio when audio is present.

Scale when useful

Reducing oversized dimensions can lower the delivery cost substantially.

HOW IT WORKS

How to compress WebM

1
Upload WebM
Choose a supported WebM source.
2
Choose quality
Pick High, Balanced or Smaller and optionally reduce resolution.
3
Download WebM
Save the new compressed file when processing finishes.

Good to know

VP9 can take longer to encode than some H.264 workflows, especially on CPU-only servers.

RELATED TOOLS

More Ways to Work With Your Media

Use a focused tool when you know the task, or open the universal converter for full format control.

QUICK ANSWERS

WebM Compressor FAQ

Does the output stay WebM?

Yes.

What video codec is used?

This build uses VP9 for WebM output.

Can I lower resolution too?

Yes. Resolution limits can be combined with compression quality settings.