Preparing a photo for canvas printing is less about memorising a single set of technical rules and more about knowing which questions to ask before you commit. File formats, resolution, colour settings and compression all interact, and the right answer depends on your source image, your intended canvas size and the specific production setup your print provider uses. This guide is a verification-first framework: it explains what to confirm, what to document, and what to ask, so you can make an informed decision rather than relying on generic advice.
Why file requirements are provider-specific
There is no universal standard that guarantees a good canvas print. Different print workflows accept different file types, handle colour differently, and apply their own preparation steps. That means the most reliable source of truth is the provider you are actually ordering from — not a blog post, a forum thread or a general checklist.
Before you prepare anything, gather the following from your chosen provider:
- The file formats they accept, and whether they prefer one over another.
- Any guidance they publish on image resolution or pixel dimensions.
- How they handle colour profiles and colour conversion.
- Whether they apply any preparation or adjustment to your file before printing.
- What happens if a file does not meet their stated requirements.
If a provider cannot answer these questions clearly, that is useful information in itself. Canvas Craft is a Singapore canvas printing business, and you can review the ordering process and available options through the Order page and the FAQ.
File formats: what to confirm rather than assume
File format affects how much image data is preserved and how easily a provider can work with your file. Rather than assuming one format is always best, confirm the following with your provider:
- Which formats they accept — and whether they have a preferred format for photographic work.
- Whether they accept layered files — and if so, how they want layers handled.
- Whether they want a flattened or merged version instead of a layered original.
- How they treat transparency — whether it is supported or should be removed before submission.
A practical habit is to keep your original working file untouched and export a separate copy for submission. That way, if the provider asks for a different format or setting, you can re-export without losing your edits.
Resolution: the question to ask before you enlarge
Resolution is where most uncertainty arises, because the acceptable figure depends on the final canvas size and the provider’s own workflow. Instead of chasing a single number, ask your provider:
- What pixel dimensions they recommend for the canvas size you have in mind.
- Whether they have different guidance for smaller versus larger prints.
- How they handle images that fall below their recommended range.
- Whether they can advise on a specific image before you order.
If you are still deciding on a size, the sizes and prices page can help you understand the options available. Canvas Craft also offers custom canvas dimensions by quotation, and customers can enter preferred dimensions on the Order page — so if your intended size is not listed, that is a conversation worth having before you finalise your file.
DPI, PPI and colour: verify, do not guess
DPI and PPI are often used interchangeably in casual conversation, but they describe different things, and their relevance depends on how your provider’s workflow interprets your file. Rather than applying a rule of thumb, confirm:
- Whether your provider refers to DPI or PPI in their guidance, and what they mean by it.
- Whether they require a specific embedded resolution value, or whether pixel dimensions matter more.
- Which colour space they recommend for photographic files.
- Whether they convert colour profiles themselves, or expect you to supply a specific one.
- Whether they offer any form of preview or proof before printing.
Colour is one of the areas where assumptions cause the most disappointment. If your provider offers soft-proofing or a preview step, use it. If they do not, ask what they recommend so you can set expectations realistically.
Scans, older photos and compressed files
Scans and older digital photos often carry limitations that no amount of file preparation can fully overcome. Before enlarging, ask your provider:
- Whether they can assess your source file and advise on its suitability.
- What their guidance is for images with visible grain, noise or softness.
- Whether they recommend any preparation steps, or prefer to receive the file as-is.
For compression, the key question is whether your provider notices a quality difference between your original and a compressed version. If you are unsure, submit the highest-quality version you have and let them advise. Avoid repeatedly re-saving a file, as each save can reduce quality.
Supplying layered or retouched files safely
If you have retouched or layered your image, confirm how your provider wants it delivered. Some workflows prefer a flattened file to avoid ambiguity; others can work with layers. Ask:
- Whether layers should be preserved, merged or flattened.
- Whether adjustment layers or masks should be applied before submission.
- Whether they want a copy of the original alongside the retouched version.
Keeping a clear record of what you submitted — file name, format, dimensions and any notes — makes it easier to resolve questions later.
Documenting your file before you order
A simple record helps you and your provider stay aligned. Note down:
- The file name and format you submitted.
- The pixel dimensions of the file.
- The colour space you used.
- Any preparation steps you applied.
- The canvas size you ordered.
This is not about bureaucracy — it is about being able to answer questions accurately if something needs to be checked. If you are ordering on behalf of an organisation or as a professional photographer, the for-pros page may be a useful starting point for understanding how to approach a larger or repeat order.
Frequently asked questions
What file format should I use for a photo canvas?
There is no single answer that applies to every provider. Confirm the accepted formats with your chosen print provider and ask whether they have a preferred format for photographic work.
How do I know if my image resolution is high enough?
Ask your provider what pixel dimensions they recommend for your intended canvas size. If you are unsure, request their guidance before ordering rather than guessing.
Should I send a layered file or a flattened one?
This depends on your provider’s workflow. Ask whether they prefer layers preserved, merged or flattened, and whether they want the original file alongside any retouched version.
Can I use a compressed file for printing?
Compression can affect quality, but whether it matters depends on the degree of compression and the provider’s process. If in doubt, submit the highest-quality version you have and ask for their advice.
Does Canvas Craft offer custom canvas dimensions?
Yes. Canvas Craft offers custom canvas dimensions by quotation, and customers can enter preferred dimensions on the Order page. For other file-related questions, check the FAQ or contact the team directly.
