Redbubble resolution checker
All four of Redbubble's hard numbers, checked at once. The file stays in your browser.
Your file, checked locally.
No account. Nothing uploaded.
Choose your file, read the checks, then download a supported fix.
Your file check
These are measured checks against the rules listed here, not a guarantee of platform approval. See specifications and sources.
A folder full of designs?
Check up to 100 files. Get platform variants and a CSV report, without uploading your artwork.
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Exports are padded and centred to each platform's size on a transparent canvas. Nothing is ever upscaled — a file enlarged to pass a dimension check still prints soft, which is the failure this tool exists to prevent.
Redbubble: the numbers that matter
| Dimensions | set per product |
|---|---|
| Graphic T-Shirt | 3873 × 4814 px |
| Premium T-Shirt | 2875 × 3900 px |
| Platform-wide long-edge rule | none |
| Platform-wide DPI threshold | none published |
| Authoritative source | the Dimensions & Format page |
How this tool calculates DPI
It ignores the DPI tag written into the file and divides the pixel count by the 12.91″ × 16.05″ print area instead — which is the figure the platform actually enforces.
Frequently asked questions
What DPI does Redbubble require?
Prepare at null DPI across the print area. Redbubble is permissive about low-resolution uploads, so the risk sits in the finished product rather than at the upload step.
Do I need an account to check a file?
No. The whole check runs in your browser — no account, no upload.