AV1 Video Compressor

How to Compress AV1 Video Online

1. Upload Your AV1 File — Drag and drop or select one or more AV1 video files.
2. Choose a Compression Method — Select Target file size % (default 80% — a 100 MB video becomes ~80 MB), Specific file size (enter an exact target in MB), Constant Bitrate (set a fixed rate in Kbps or Mbps), Variable Bitrate (set target, min, and max bitrate for scenes that vary in complexity), Constant Quality via CRF slider (0–63, where 30 is default — lower means higher quality and larger files), or Constraint Quality (CRF + max bitrate cap).
3. Adjust Resolution (Optional) — Reduce by percentage, pick a preset (4320p/8K down to 144p), or enter exact width, height, or width × height in pixels or percent.
4. Trim (Optional) — Set a start time and duration in seconds or HH:MM:SS.sss to extract a specific segment.
5. Compress & Download — Click Compress and download the smaller AV1 file.

Why Compress AV1 Video?

AV1 is the next-generation open video codec backed by YouTube, Netflix, and the Alliance for Open Media. It delivers files 30–50% smaller than H.264 and up to 30% smaller than HEVC at the same visual quality. However, raw AV1 recordings or exports from editing software can still be large — especially at 4K or higher resolutions. Compressing AV1 further with a target file size or CRF adjustment lets you hit upload limits, reduce storage costs, or speed up streaming without re-encoding to a less efficient codec.

AV1 vs Other Video Codecs

CRF Quality Guide for AV1

Use Cases

• Web video optimization — Serve AV1 in an MP4 container with an H.264 fallback using the <video> tag's <source> element for broad compatibility.
• YouTube / streaming uploads — Pre-compress to AV1 before uploading so the platform spends less time re-encoding.
• Archival — Store high-resolution footage at CRF 20–25 for near-lossless quality at a fraction of the raw file size.
• GIF replacement — AV1 video loops are 20–40× smaller than equivalent GIF animations with better color depth and smoother playback.

Is AV1 better than H.264 for compression?

Yes. AV1 produces files 30–50% smaller than H.264 at the same visual quality. The trade-off is slower encoding time, but for pre-compressed web content the one-time cost is worth the bandwidth savings.

What CRF value should I use for AV1?

For most purposes, CRF 28–32 offers a good balance between quality and file size. Lower values (20–25) preserve more detail for archival or professional use. Higher values (35–45) are suitable when file size is the priority.

Can I change the video codec when compressing?

Yes. XConvert's AV1 compressor lets you select from AV1 (default), H.264, H.265, VP9, VP8, MPEG-2, MPEG-4, DivX, Xvid, and more under the Video Codec option in Advanced settings.

Does compressing AV1 remove the audio track?

No. The audio track is preserved. You can also change the audio codec — AV1 files default to Opus, but AAC, MP3, FLAC, AC3, and many others are available under Audio Codec settings.

Can I trim an AV1 video while compressing?

Yes. Use the Trim option to set a start time and duration in seconds or HH:MM:SS.sss format. Only the selected segment is compressed and exported.