DivX to WebM Converter

Convert DivX to WebM Online

Bring an old DivX rip onto the modern web. DivX is the early-2000s MPEG-4 Part 2 codec from the DVD-rip era, and a .divx or .avi file will not load in an HTML5 <video> tag or open on most phones without a third-party player. WebM will: caniuse puts it at roughly 96% of tracked browsers, with full support in Chrome 25+, Firefox 28+, Edge 79+, and Safari 16+. This is a genuine re-encode from MPEG-4 Part 2 to VP9, not a rewrap — the result can match your source but will never look sharper than a 2000s rip ever did.

How to Convert DivX to WebM

1. Upload Your DivX File: Drag and drop your .divx or .avi file onto the page, or click "+ Add Files" to browse. Several files can be queued and converted with the same settings.
2. Keep or Change Video Codec and Audio Codec: Open Advanced Options. The output defaults to VP9 video and Opus audio, which is the best all-round pairing for web delivery. VP8 and AV1 are the alternatives under Video Codec; Vorbis is the alternative under Audio Codec.
3. Set Quality Preset, Video resolution, or Trim: Quality Preset starts on "Very High (Recommended)". Switch to Constant Quality to type a CRF directly — for VP9 that box starts at 30 on a 16–63 scale, where lower means better. Specific file size, Constant Bitrate, and Variable Bitrate are also available, Video resolution stays on "Keep original" until you choose a preset, and Trim is "Unchanged" until you set a Time Range.
4. Convert and Download: Click "Convert" and download the WebM file. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark, never shared or made public.

DivX Source vs WebM Output

Choosing VP9, VP8, or AV1

Audio follows the same logic. WebM permits only Opus and Vorbis, so a DivX file's MP3 or AC-3 soundtrack is always decoded and re-encoded. Opus is the default and the better codec at every bitrate that matters; pick Vorbis only if something downstream specifically requires it.

What Carries Over and What Does Not

• Picture and sound carry over, re-encoded to VP9 and Opus. Frame rate and aspect ratio are preserved.
• Resolution is preserved unless you change it — Video resolution sits on "Keep original" by default, and every preset keeps the aspect ratio.
• Subtitle tracks do not carry over. The DivX Media Format can embed bitmap subtitles, and this conversion writes video and audio only. Keep any separate .srt file alongside the WebM instead.
• Chapters, tags, and menu data do not carry over. Those live in the AVI-derived container and have no equivalent in the output this tool writes.
• Extra audio tracks are not preserved as separate selectable streams; plan on a single soundtrack in the result.

Frequently Asked Questions

Will converting DivX to WebM lose quality?

Some, yes — this is a full re-encode rather than a rewrap. MPEG-4 Part 2 and VP9 share nothing at the bitstream level, so every frame is decoded and re-compressed, and that second lossy pass discards a little detail. Leaving Quality Preset on "Very High" keeps the loss below what most people notice at normal viewing distance. The one thing no setting can do is improve on the source: a soft, low-bitrate DVD rip stays soft.

Why bother converting an old DivX file at all?

Because DivX is a dead end on the modern web. A .divx or .avi file will not play in a browser <video> element, will not open on most phones without VLC or similar, and is increasingly unsupported by editors and media servers. WebM was built for HTML5 delivery and plays natively across current browsers. The conversion usually shrinks the file too, since VP9 is a far newer codec than MPEG-4 Part 2. If your priority is maximum device support rather than the open web specifically, DivX to MP4 reaches more hardware, including older smart TVs and set-top boxes.

What happens to the audio track?

It is re-encoded, unavoidably. A DivX file normally carries MP3 or AC-3 audio, and the WebM container permits neither — only Opus and Vorbis. The soundtrack is therefore decoded and re-encoded to Opus by default. At the default quality that is inaudible for ordinary dialogue and music from a DVD rip, but it is still a lossy-to-lossy step, so it cannot add fidelity the original lacked.

What CRF value should I use in Constant Quality mode?

VP9's CRF scale runs 0–63 and the box starts at 30, which is a sensible middle ground for standard-definition source material. Lower numbers spend more bits and look better; higher numbers shrink the file and soften it. For a DVD-era DivX rip there is limited value in going below about 24, because you would be spending bits preserving compression artifacts rather than detail. If you prefer not to think in CRF at all, leave the mode on Quality Preset.

Can I convert a DivX file to WebM without re-encoding it?

No, and no tool can. A stream copy only works when the source and destination containers both accept the same codec, and WebM accepts only VP8, VP9, and AV1 video with Opus or Vorbis audio. MPEG-4 Part 2 video and MP3 audio are not on either list, so a transcode is mandatory. This is a property of the WebM specification, not a limitation of this converter.

Why is my WebM larger than the DivX I started with?

Usually because the source was encoded at a very low bitrate and the quality preset is now spending more bits than the original did. VP9 is more efficient than MPEG-4 Part 2 at equal quality, but "equal quality" for a heavily compressed 700 MB rip can still be a large number. If size is the goal, switch to Specific file size and name a target, drop the Video resolution to a smaller preset, or raise the CRF in Constant Quality mode. You can also run the result through Compress WebM afterward.

My .divx file won't upload or convert — what's wrong?

Two usual causes. First, size: feature-length rips can run past a gigabyte, and the whole file must reach our servers before encoding starts, so a slow connection looks like a stalled conversion. Trimming the source first, or converting only the section you need, makes a large difference. Second, DRM: some .divx files are protected DivX Media Format downloads from commercial stores, and those cannot be decoded at all. A plain MPEG-4 Part 2 rip converts without trouble.

I have a whole folder of old AVI files — is there a better starting point?

If those files are ordinary AVI rather than DivX-branded specifically, AVI to MP4 covers the same source footage and produces a file with broader device playback than WebM. Use WebM when the destination is a web page or an app you control, and MP4 when the destination is other people's devices. Both accept the same batch upload, so you can queue several files and apply one set of settings across all of them.