Convert PDF colors with ICC profiles
Use PDF Press to convert PDF color spaces, soft proof, and check gamut with ICC profiles. It is built for prepress teams preparing RGB, CMYK, and press-profiled PDFs, with local browser processing and a live preview before export.
Direct answer
What is convert PDF colors?
ICC color management: convert between color spaces, soft-proof on screen, and check gamut boundaries.
Color Convert uses the PDF Press engine to perform ICC-based color space transformations. Upload your target device ICC profile (FOGRA39, GRACoL, SWOP, or custom) and convert pages from one color space to another using the correct rendering intent. Soft proofing simulates how colors will look on the target device without altering the file. Gamut warning highlights colors that fall outside the destination profile's reproducible range.
How to use Color Management
Upload files
Start with your source PDF or image files. Processing happens locally in the browser.
Add Color Management
Configure Profiles, Rendering Intent, Conversion Options and any production settings that match the job.
Preview the result
Check page order, marks, scaling, and output geometry before committing the export.
Download output
Export the finished PDF for proofing, press, finishing, or another PDF Press step.
Best use cases
Key settings
Profiles
Pick the source space (or let it be detected), then the profile to convert into.
Source Profile: the color space your document is currently in (usually sRGB for screen-designed files). Leave it on Auto-detect and the document's own output intent or embedded image profile is used. Destination Profile: the target device profile to convert into. Upload .icc or .icm files from your print provider, or use a standard profile (e.g., FOGRA39 for European coated offset, GRACoL 2006 for US sheetfed, SWOP for US web offset). CMYK and printer profiles are not bundled due to licensing: you must upload your own. Only output ("prtr") or display ("mntr") class profiles can drive a conversion.
Rendering Intent
How colours are mapped when the destination cannot reproduce them all.
Perceptual compresses all colors proportionally, keeping visual relationships: best for photos. Relative Colorimetric preserves in-gamut colors exactly and clips the rest: the prepress default, best for logos and brand colors. Saturation maximizes vibrancy at the cost of hue accuracy: best for charts and graphics. Absolute Colorimetric reproduces exact colors including paper white simulation: best for contract proofing. Black-point compensation rescales the darkest source tone onto the darkest printable tone, so shadow detail survives instead of clipping to a flat black. Note that matrix/TRC-based profiles carry no per-intent tables, in which case all four intents give the same result.
Conversion Options
Whether the pixels are actually rewritten, and how pure black is handled.
Convert colours rewrites the page content into the destination space and embeds it; leaving it off only attaches an output-intent tag, declaring the intended space without changing any values. Preserve pure black keeps K-only text and line art on the black plate alone, so small type does not turn into four-color black and go soft with the slightest misregistration. Conversion runs through the ICC engine at object level, so vector art and live text stay editable: pages are not rasterized. Documents with optional-content layers are flattened by the re-distill, however.
Soft Proofing
Preview how colors will appear on the target device without modifying the file.
Soft proofing renders the preview through the proofing profile to simulate the target output device on your monitor. This is non-destructive: only the canvas preview changes, not the PDF data. Simulate Paper White: accounts for the paper stock's whiteness: important for uncoated stocks where "white" is actually cream/gray. Accurate soft proofing requires a calibrated monitor (ideally with a hardware calibrator like an i1Display or SpyderX).
Gamut Warning
Highlight colors in the preview that cannot be reproduced by the destination profile.
Out-of-gamut colors are replaced with a solid warning color (default: bright green) in the preview so you can see exactly which areas will lose saturation or shift hue during conversion. This is preview-only: the PDF is not modified. Requires a destination profile to be set. Common problem areas: saturated blues/greens in RGB that can't be reproduced in CMYK, and neon/fluorescent colors.
Pages
Specify which pages to process using a range expression.
Examples: 'all' = every page. '1-5' = pages 1 through 5. '1,3,5' = specific pages. '1-10 odd' = odd pages 1-9. '2-20 even' = even pages 2-20. 'last' = last page. 'last-2' = third from last. Ranges are 1-based. Combine with commas: '1-5, 8, 12-15'.
Expert tip
Convert RGB sources to CMYK using your press profile (FOGRA39 for European coated, GRACoL for US sheetfed) before imposition. This keeps colour consistent across all pages.
Converting CMYK-to-CMYK with mismatched profiles will shift your colours. Only re-profile when you are actually changing the target press condition.
Production recipes using Color Management
Comic Book Signatures
Comic book or graphic novel imposed in saddle-stitch or perfect-bound signatures.
Photo Book
Lay-flat photo book with flush-mount or perfect binding.
Corrugated Packaging
Large-format corrugated box or display printed on flatbed or flexo.
Print-Ready Preparation
Standard pre-flight and preparation workflow for incoming files.
What print pros say
I print zines on a Risograph and the imposition was always the painful part. PDF Press lays out my zine pages for saddle-stitch booklet printing in seconds, page order, creep and all.
Imposing a saddle-stitched booklet used to be the part of prepress I dreaded. Now it's a layout dropdown and a live preview. Easily the easiest impose tool I've used.
We gang up sticker sheets all day. Drop the artwork, set the grid, add cut marks, and N-up sticker imposition that used to need an Illustrator script now takes one click.
Frequently asked questions
What is Color Management used for?
ICC color management: convert between color spaces, soft-proof on screen, and check gamut boundaries.
Who should use convert PDF colors?
It is built for prepress teams preparing RGB, CMYK, and press-profiled PDFs. Common use cases include RGB → CMYK Conversion, Press Profile Matching, Soft Proofing, Gamut Checking, Color Space Normalization.
Do my PDF files upload to a server?
No. PDF Press runs the PDF processing workflow in your browser, so your files stay on your device.
Can I use Color Management with other PDF Press tools?
Yes. You can combine it with other PDF Press tools in a multi-step workflow, then preview and export the final PDF.