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Review runs in the browser, so almost any file uploads and downloads. What decides whether it previews is its format and its size, not whether dfine.io accepts it.
These are the current limits during the Review beta, as of 21 August 2026. They can change, so treat this page as the current state rather than a fixed promise. Storage quotas depend on your plan and live on Pricing, not here.

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Three ways a file behaves

The browser decodes these natively.Image: JPG, JPEG, PNG, WEBP, GIF, BMP, AVIF Audio: MP3, AAC, M4A, FLAC, WAV
dfine.io encodes these into an HLS stream with a poster frame and scrub sprite (video), or an optimized WebP (VFX and HDR stills). The original stays downloadable.Video: MP4, WEBM, MOV, AVI, MKV, WMV, FLV, MXF, M4V, 3GP, 3G2, YUV VFX / HDR images: TIFF, TIF, TGA, EXR, DPX, HDR, SGI
Browsers cannot render these, or codec support is too inconsistent to rely on (Safari, for one, does not decode OGG or Opus). Upload and download both work; there is no player.Audio: OGG, OPUS, AIFF, AIF, WMA Image without a browser decoder: PSD, HEIC, CIN Camera raw photo: CR2, CR3, CRW, NEF, ARW, DNG, ORF, RW2, RAW, 3FR, MRW, PEF, RAF, SR2, SRF, SRW Camera raw video: R3D, ARI Graphic / layout: AI, EPS, INDD, DWG, SVG DaVinci Resolve project: DRP, DRT, DRA Office and archive: PDF, DOC, DOCX, XLS, XLSX, PPT, PPTX, TXT, CSV, ZIP, RAR
A format outside these three lists is rejected at upload with “File extension not allowed.” Write to support@dfine.io if you need one added.

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Three ways a file ends up download-only

A file can upload completely and still not get a preview. That happens for one of three reasons, and all three feel the same from the outside: the file sits in your project, downloads correctly, and never shows a player.
  1. Its format has no encoder. Anything in the “uploads and downloads, no preview” list above: camera raw, project files, Office documents, and so on.
  2. It is over 5 GB. Upload accepts files up to 150 GB, but encoding, the step that makes a preview, tops out at 5 GB. An 8 GB MOV uploads fine and never enters the encoding queue.
  3. It is a video over 15 minutes. Long-format video is not encoded regardless of file size. You get an email when it finishes uploading, letting you know it is ready to download.
Keep anything you need to review frame by frame under 5 GB and 15 minutes. Longer or heavier masters still work as a downloadable archive copy.

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Current numbers

Where do storage quotas live?

Plan-dependent, not covered here.