Convert screen-RGB artwork to press-ready CMYK with a real ICC profile - and see exactly how the colors will shift before you print. No signup to convert. Files are deleted after processing.
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Try the interactive sandbox → Browse all demosYour report and proof appear here after you upload a file - free, no signup.
Filecheck converts every customer upload to CMYK automatically - on your store, before a bad file reaches your print queue.
Automate this on your store →Filecheck does it automatically for every customer upload - on WooCommerce, Shopify, PrestaShop, OpenCart, or any site - before a bad file ever reaches your queue.
Drop an RGB image or PDF. The conversion runs cloud-side with a proper ICC profile - not a naive channel swap.
A side-by-side soft-proof shows your original next to the CMYK result, so you can see the color shift before anything goes to press.
Download the converted, print-ready file with black preserved as 100% K - free, no signup.
PDFs are the format printers actually receive, and they are also where naive converters fail: a PDF can mix RGB images, vector fills, gradients and text colors in one file. This converter maps every RGB object in the document - across all pages - through the press ICC profile, while text and vectors that are already pure black stay on the black plate as 100% K (see rich black for why that matters). The file stays a PDF and the layout is untouched.
This is the usual cure for Canva, Figma and browser-tool exports, which are always RGB. Drop your PDF in the converter above and compare the proof before anything goes to press.
Raster images are converted pixel-by-pixel through the same ICC profile - not a channel swap, so out-of-gamut colors are mapped to their closest printable match instead of clipping. JPEG and TIFF can carry CMYK natively; PNG cannot store CMYK at all, so a converted PNG is delivered in a print-ready format that can.
Typical cases: product photography headed for a catalog, screenshots going into a printed manual, or artwork exported from a web design tool. If you also need to know whether the image is sharp enough at print size, run it through the free image DPI checker afterwards.
RGB describes emitted light; CMYK describes ink on paper. A screen can show saturated blues, greens and oranges that no ink set can physically reproduce, so some color shift in conversion is unavoidable - the question is whether it is controlled. A proper conversion uses a press ICC profile (Coated FOGRA39 for European offset, GRACoL for US) to map out-of-gamut colors predictably, keeps true black as 100% K, and respects limits like total ink coverage.
That is the difference between "the file says CMYK now" and "the printed sheet looks like what you approved". The side-by-side proof this tool renders exists precisely so you see the shift before your printer does. More background: spot colors vs CMYK.
Some print shops prefer receiving RGB files and converting in-house with their own press profile; many others require CMYK on delivery and reject or silently convert anything else. Converting yourself is the predictable path: you see the proof, you control black handling, and there are no surprises at the press. If your printer published a spec sheet, follow it.
Either way, run the converted file through the free PDF preflight checker before submitting - color is only one of the things printers reject files for; bleed, resolution and fonts are the others.
RGB is emitted light and can show colors that ink on paper physically cannot reproduce - especially vivid blues, greens and oranges. A proper ICC conversion maps those out-of-gamut colors to their closest printable equivalent. Seeing the shift on screen first is exactly what the side-by-side proof is for.
Yes. The converter handles multi-page PDFs as well as PNG, JPEG and TIFF images, converting every RGB object in the file - images, vector fills and text colors alike.
Coated FOGRA39, the common European offset standard, with GRACoL available for US workflows. Using a real press profile is what makes the output predictable on paper instead of just "looking converted" on screen.
Yes. Naive conversions turn black text into a four-color "rich black" mix, which looks blurry in print if the plates are even slightly misregistered. This converter preserves true black as 100% K on the black plate only.
Photoshop can do ICC conversions if you pick the right profile, but Canva and most browser design tools only export RGB. And a mode switch alone says nothing about K-preservation or how a specific press will render the result. This tool does the conversion the way prepress software does, free, in the browser.
Yes - PNG, JPEG, TIFF and WebP are all accepted. Note that PNG itself cannot store CMYK data, so the converted result is delivered in a print-ready format that can; TIFF and JPEG carry CMYK natively.
Yes - converting, the before/after proof and the download of the converted file are all free, with no signup and a daily fair-use cap.
The complete preflight report in seconds - geometry, color, ink, fonts, images and structure. Optionally check against your own trim size, bleed and resolution.
Validate a PDF against archival and accessibility standards - PDF/A-1b, 2b, 3b or PDF/UA - with every failed clause listed.
Pad any product photo to a perfect square on a white background, strip EXIF data, and check it against marketplace listing rules.
Extend your artwork past the trim line with exactly the bleed your printer asks for - 3mm business card or 10mm banner - without reopening the design file.
Find the effective DPI of your image at the size YOU want to print it - a photo that is razor sharp as a postcard can be a blur as a poster.