Compress DivX Video

How to Compress DivX Online

1. Upload Your DivX File: Drag and drop your .divx file or click "Add Files" to choose one from your device. Batch uploads are supported, and processing runs in your browser session — no account, no watermark.
2. Pick a File Compression Method: Default is Target file size (%) with a 1-100 slider and Smart Scaling, which reduces size proportionally to the chosen percentage. Switch to Specific file size to enter an exact MB/KB target, Constant Quality (CRF) for the best size-to-quality ratio, Constant Bitrate for predictable streaming, Variable Bitrate for efficient scene-adaptive output, or Constraint Quality to cap peak bitrate while encoding by CRF.
3. Set Video Resolution and Trim (Optional): Under Video Resolution, keep the original or pick a preset (2160p, 1440p, 1080p, 720p, 480p, 360p, 240p), enter custom Width/Height, or scale by percentage. Under Trim, set Start Time and Duration to remove credits or unwanted sections in the same pass.
4. Compress and Download: Click Convert, then download the reduced .divx file when the job finishes.

Why Compress DivX?

DivX is a video format built on the MPEG-4 Part 2 Advanced Simple Profile (ASP) codec, popularised in the early 2000s for fitting DVD-quality movies onto a single CD-R. Although the modern DivX 10 software now ships H.264 and HEVC encoders too, legacy .divx files in the wild are typically MPEG-4 ASP wrapped in AVI — far less efficient than H.264 or H.265 at the same bitrate. Compressing or re-encoding shrinks them for today's storage and transport.

• Email and chat attachment caps — Gmail and Outlook.com both cap attachments at 25 MB; Discord's free tier dropped to 10 MB in September 2024. Most full-length DivX rips need to drop well below 50% to fit.
• Cloud-storage quota — A 90-minute DivX movie at a typical Home Theater bitrate (around 1-1.5 Mbps video plus audio) occupies roughly 800 MB-1 GB. iCloud's free 5 GB plan and Google Drive's free 15 GB plan fill up fast without compression.
• Old DVDs and camcorder archives — DVD-Video and many early HDD camcorders shipped MPEG-2 or MPEG-4 ASP at high bitrates. Re-encoding to a lower CRF or smaller target size frees archive space without losing what made the source watchable.
• Sharing over USB and SD cards — A FAT32-formatted USB stick has a 4 GB per-file ceiling. Shrinking a 4.5 GB DivX file under that limit avoids reformatting to exFAT.
• Smart TV and Blu-ray playback — Many DivX-Certified Home Theater devices reject files that exceed the profile's resolution and bitrate limits (DivX profile table). Re-encoding to stay inside the envelope keeps the file playable on 2005-2012 LG, Sony, Panasonic, and Philips players.
• Faster uploads — On a 10 Mbps upstream connection, halving a 900 MB file saves around 12 minutes of wall time.

If you only need to trim, use Trim DivX instead — no re-encoding means no quality loss.

DivX vs Modern Codecs — Compression Efficiency

Convert when the destination is modern: DivX to MP4 (H.264) or DivX to HEVC usually halves size while improving visible quality.

Compression Method Cheat Sheet

Frequently Asked Questions

Will the output still play on my old DivX-Certified DVD or Blu-ray player?

Yes, if you keep the video codec set to DivX (MPEG-4 ASP) and stay inside the Home Theater profile envelope — roughly SD resolution (640x480 at 30 fps or 720x576 at 25 fps) with a moderate average bitrate (DivX profile table). Use the Constraint Quality method to cap peak bitrate so the device's decoder buffer isn't overrun.

Should I keep DivX, or re-encode to H.264 or HEVC?

Re-encode to H.264 (.mp4) for general use — at the same visible quality, H.264 files run roughly half the size of MPEG-4 ASP. Re-encode to HEVC if the target device supports it (iPhone since 2017, most 4K TVs, modern Android) for another 25-50% reduction. Keep DivX only if you specifically need playback on a 2005-2012 DivX-Certified device that doesn't speak H.264.

How small can I make a DivX file without it looking awful?

For SD content (480p or 576p), DivX at 800-1000 kbps still looks reasonable; below 500 kbps you'll see blocky macroblocks in motion. For 720p, plan on 2000-2500 kbps minimum. Constant Quality with a CRF in the 22-26 range generally beats fixed bitrates because the encoder spends bits where they matter (motion) and saves them on static scenes.

What's the difference between Variable Bitrate and Constant Quality?

VBR targets a specific average bitrate over the whole clip; the encoder shifts bits between scenes but still hits that average. Constant Quality (CRF) targets a quality level instead, so a busy action film ends up larger than a static interview shot at the same CRF. Use VBR when you need a predictable total size; use CRF when you care about consistent picture quality.

Can I shrink the audio track too?

Yes. Under Audio Codec the default for DivX output is MP3; lowering MP3 bitrate to 128 kbps (from a typical 192 or 320 kbps) saves around 1 MB per minute. For DivX Home Theater compliance, AC-3 (Dolby Digital) is also supported, but MP3 at 128-192 kbps is the safest cross-device choice.

Does compressing also remove the DRM on protected DivX files?

No. If the input is a DRM-protected DivX VOD purchase (the .divx extension was also used for the now-discontinued DivX Video-on-Demand store), the encoder cannot read the encrypted stream. You'll need an unprotected source file. The conversion does not break, strip, or attempt to circumvent DRM.

Why does my compressed file look worse even though the bitrate is similar?

MPEG-4 ASP doesn't recompress losslessly — every encode pass adds artefacts. If you start from an already-compressed DivX file and re-encode at the same bitrate, the second pass has to discard information again and the result will look softer than the source. For best results, re-encode from the highest-quality master you have, or move to a more efficient codec (H.264/HEVC) so you can lower the bitrate further without visible loss.

Is there a file size or upload limit?

xConvert handles files up to several GB in the browser, but very large uploads are limited by your RAM and the time your tab stays open. For multi-GB DivX rips, expect long upload + encode times — a 4 GB file on a 10 Mbps line takes around 55 minutes to upload alone.

Can I batch-compress a folder of DivX files?

Yes — drop multiple files on the upload zone and apply the same settings to each. Each file is processed in turn and downloaded as a separate .divx. If you want a different container (MKV or MP4) at the end, use DivX to MKV or DivX to MP4 with the same compression options.