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Supports: PSD
A Photoshop document (.psd) holds your full editable layer stack, smart objects, masks, and adjustment layers — Adobe's spec caps PSD at 30,000 × 30,000 pixels and 2 GB, with PSB taking over above that. The format only opens cleanly in Photoshop, Affinity Photo, GIMP, Photopea, and a handful of paid editors, so sending a .psd to a client or printer who doesn't run those apps is a dead end. A merged PDF flattens every design into a single, universally viewable, print-ready document that opens on any phone, browser, or e-reader.
| Property | PSD (Photoshop Document) | PDF (Portable Document Format) |
|---|---|---|
| Owner / spec | Adobe (proprietary, public spec) | ISO 32000 (ISO 32000-2:2020) |
| Primary purpose | Editable layered image source file | Universal page-based document delivery |
| Max dimensions | 30,000 × 30,000 px (PSB: 300,000 × 300,000) | 14,400 × 14,400 px per page (5,080 mm side) |
| Max file size | 2 GB (PSB: ~4 EB theoretical) | No fixed cap; readers usually handle ≤10 GB fine |
| Layers / masks | Full support, with adjustment & smart-object layers | Flattened raster; PDF layers (OCG) exist but PSD layers don't survive |
| Color modes | RGB, CMYK, Lab, Grayscale, Indexed, Duotone, Multichannel, Bitmap | RGB, CMYK, Grayscale, Lab, Spot |
| Bit depth | 8 / 16 / 32 bits per channel | 8 / 16 bits per channel |
| Multi-page native | No (one canvas per file) | Yes (designed for it) |
| Free-tool support | Photoshop, Affinity, GIMP, Photopea, Krita | Acrobat Reader, Preview, every browser, every phone |
| Best for | Active editing, source-of-truth | Sharing, printing, archiving |
| Setting | Available values | Default | When to pick |
|---|---|---|---|
| Combine | Single PDF / Individual PDFs | Single PDF | Single for portfolios; Individual when each design has a different recipient |
| Paper Size | Original, Letter, Legal, Tabloid, Ledger, Executive, A3, A4, ISO B4, ISO B5, ARCH A, ARCH B, Screen | A4 | A4 for international print, Letter for US, Tabloid/A3 for posters, Original to preserve native PSD dimensions |
| Page Layout | Portrait, Landscape | Portrait | Landscape for web/UI mockups (16:9, 21:9), Portrait for posters and print collateral |
| Margin | No margin, Narrow 0.5", Moderate 0.75×1", Normal 1", Large 2×1" | Narrow (0.5") | No margin for bleed/print-ready, Normal for documents with binding, Narrow for portfolios |
| Image Placement | Contained, Cover | Contained | Contained preserves the full design; Cover fills edge-to-edge but may crop |
| Image Alignment | Top, Center, Bottom | Center | Center for portrait artwork, Top for wide banners with breathing room below, Bottom for caption space above |
| Image Quality | 1–100 (%) | 75 | 60–75 for screen review, 85–95 for client presentation, 100 for prepress |
| Image Transparency | Unchanged, Removed | Unchanged | Removed = flat white background; pick this when the design relies on a solid backdrop |
No. The tool flattens each PSD's visible layer composite into a single raster image per page — adjustment layers, smart objects, layer styles, and masks are all baked in. The output is a raster-image PDF (text inside the PSD is not selectable or searchable). If you need editable layers downstream, archive the original PSD alongside the PDF or export the PSD as a layered PDF directly from Photoshop's "Save As → Photoshop PDF" instead.
Three causes account for almost every difference: (1) Paper Size — if you pick A4 for a 1920 × 1080 PSD, the design is scaled to fit unless you choose "Original"; (2) Image Placement — "Contained" centers within the margin and may leave white space, while "Cover" crops to fill; (3) Color mode — CMYK PSDs are converted to RGB during PDF rendering, which can subtly shift saturated reds, blues, and oranges. Pick "Original" paper size and "Contained" placement to match the source canvas as closely as possible.
Hidden layers (eye icon off in Photoshop) are not rendered — only the visible composite is exported. Layer effects (drop shadow, stroke, outer glow) and smart object content render exactly as they appear in Photoshop's main view. If a layer is hidden but you want it in the PDF, re-save the PSD with that layer turned on before uploading.
Adobe's own format limits are 30,000 × 30,000 px and 2 GB for PSD; PSB (Photoshop Large Document) extends that to 300,000 × 300,000 px and effectively unlimited size. This page accepts standard .psd files only — for .psb documents, re-save as .psd in Photoshop first (Image → Image Size to bring dimensions under 30,000 px if needed). Very large PSDs (>500 MB) take longer to flatten; expect 10–60 seconds per file depending on layer count.
Yes. After uploading, drag the file thumbnails in the queue to reorder them — the queue order becomes the PDF page order. If you've already converted, you can split or reorder downstream using Compress PDF (also reorganises pages) or any standard PDF editor.
"Contained" is the safer default for portfolios: every pixel of the design is visible, padded with margin space — perfect for case studies where cropping a corner would undermine the work. "Cover" is right for full-bleed posters or hero shots where you want zero whitespace and the edges are decorative rather than load-bearing.
Functionally yes for most use cases, but with two caveats. (1) Color: the PDF is rendered in RGB, so for CMYK prepress you should convert the resulting PDF to CMYK in Acrobat Pro or pre-convert the PSDs to CMYK and reverify after merging. (2) Bleed: pick "No margin (0")" plus a paper size 0.125" larger than your trim size if your printer requires bleed. For everyday office printing, the default A4 / Narrow margin / Quality 75 is fine.
Compression is driven by the Image Quality slider — at 50% expect roughly 8× shrinkage versus 100%, with visible JPEG artifacts in gradients and skin tones; at 75% (default) you'll typically see 4–5× shrinkage with no perceptible loss at viewing distance. For maximum shrinkage on screen-only PDFs, set Quality to 60 and Image Transparency to "Removed". To squeeze a finished PDF further, run it through Compress PDF afterward.
No persistent storage — files are processed in your browser session and removed when you close the tab. There's no account requirement and no watermark on the output. If you need a fully offline workflow for confidential client work, Photoshop's File → Automate → PDF Presentation does the same job locally, or use Merge Image to PDF after exporting PSDs as PNG/JPEG.