Reviews, files, and versions
File formats, previews and conversion
Check which files open for comments, which need a preview and which require conversion.
Who this is forOwnersAdministratorsMembersCreative teamClients and reviewers
Reviewed on November 9, 2026
Formats, previews and conversion
Per file: Free 25 MB; paid plans 500 MB. 3D models: up to 50 MB, subject to the lower plan limit.
| Format | Use in a review | Requirement and next step |
|---|---|---|
| JPG / JPEG | Commentable preview | Upload a valid image. Appearance can vary with color profile and browser. |
| PNG | Commentable preview | Upload a valid image. Appearance can vary with color profile and browser. |
| WebP | Commentable preview | Upload a valid image. Appearance can vary with color profile and browser. |
| GIF | Commentable preview | Upload a valid image. Appearance can vary with color profile and browser. |
| SVG | Commentable preview | Upload a valid image. Appearance can vary with color profile and browser. |
| AVIF | Commentable preview | Upload a valid image. Appearance can vary with color profile and browser. |
| BMP | Commentable preview | Upload a valid image. Appearance can vary with color profile and browser. |
| TIFF / TIF | Commentable preview | The preview converts single-page TIFF to an image. Check the result; export multi-page files to PDF. The original remains available according to download permissions. |
| Commentable preview | Upload an unprotected PDF for preview. If password protected, export an unlocked copy with permission. | |
| MP4 | Commentable preview | MP4 H.264 with AAC audio is the recommended conversion. MOV and WebM depend on codecs and browser; changing only the container may not help. |
| MOV | Commentable preview | MP4 H.264 with AAC audio is the recommended conversion. MOV and WebM depend on codecs and browser; changing only the container may not help. |
| WebM | Commentable preview | MP4 H.264 with AAC audio is the recommended conversion. MOV and WebM depend on codecs and browser; changing only the container may not help. |
| PSD / PSB | Original + preview | Automatic PSD previews from Flow. 8-bit RGB, up to 100 MB and 16 megapixels. Check the preview before uploading; the original PSD stays with the version for download. On Free or Essential, or if the PSD is incompatible, also upload a PDF, PNG or JPG with the same base name. For PSB, always upload a manual preview. |
| AI / EPS | Original + preview | Pair the Adobe original with a reviewable PDF, PNG or JPG. The original is for download; comments and decisions concern the preview. Check that the two files match. |
| INDD / IDML | Original + preview | Pair the Adobe original with a reviewable PDF, PNG or JPG. The original is for download; comments and decisions concern the preview. Check that the two files match. |
| DOC / DOCX | Convert before uploading | New Word and PowerPoint files are neither rendered nor accepted as review originals. Export DOCX/PPTX to PDF for comments. |
| PPT / PPTX | Convert before uploading | New Word and PowerPoint files are neither rendered nor accepted as review originals. Export DOCX/PPTX to PDF for comments. |
| GLB | Commentable preview | GLB, FBX, STL and OBJ open in the 3D viewer. Prefer GLB with embedded resources; external texture files are not fetched automatically. |
| FBX | Commentable preview | GLB, FBX, STL and OBJ open in the 3D viewer. Prefer GLB with embedded resources; external texture files are not fetched automatically. |
| STL | Commentable preview | GLB, FBX, STL and OBJ open in the 3D viewer. Prefer GLB with embedded resources; external texture files are not fetched automatically. |
| OBJ | Commentable preview | GLB, FBX, STL and OBJ open in the 3D viewer. Prefer GLB with embedded resources; external texture files are not fetched automatically. |
| ZIP | Import files from ZIP | ZIP is read in the browser. Select compatible files; the original ZIP is not uploaded as a preview. See the ZIP guide for import limits. |
| HEIC / HEIF | Convert before uploading | Convert HEIC/HEIF to JPG or PNG before selecting. |
| AVI / OGV / OGG | Convert before uploading | Convert AVI/OGV/OGG to MP4 H.264/AAC before selecting. |
Before you start
- Per file: Free 25 MB; paid plans 500 MB. 3D models: up to 50 MB, subject to the lower plan limit.
Quick task overview
Start with these steps. If the task has more steps, they appear right below.
- Step 1
Check the table and plan limit before selecting files.
- Step 2
On Flow and higher plans, select just the compatible PSD and check the generated preview before publishing. For manual previews of Adobe originals, check that the two files match. For Office, export to PDF.
What should happen
A compatible file opens for review; linked originals are available only according to download permissions.
Common problems
- MP4 H.264 with AAC audio is the recommended conversion. MOV and WebM depend on codecs and browser; changing only the container may not help.
- Upload an unprotected PDF for preview. If password protected, export an unlocked copy with permission.
Related articles
How to upload a file for reviewUpload the initial work and confirm the version is ready before sharing.Open articleImport artwork from a ZIP fileOpen a ZIP in your browser, select artwork, and create one review for all files or one review per file.Open articleHow to compare versionsCheck what changed between two uploads in the same review.Open article