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Supports: 3FR, ARW, AVIF, BMP, CR2, CR3 +30 more
PDF (ISO 32000) is the only format that opens identically on Windows, macOS, iOS, Android, ChromeOS, and Linux without an extra viewer, so wrapping photos and scans inside a PDF is the safest way to ship them. A folder of 20 loose JPEGs arrives at the recipient as 20 separate attachments that can lose order, get reordered by Mail.app sorting, or stop previewing on phones that don't know HEIC. A single PDF preserves order, embeds the images at full resolution by default, prints to A4 or Letter without re-pagination, and can be password-protected, signed, or commented on in any PDF reader.
| Family | Extensions | Typical source |
|---|---|---|
| Standard photos | JPG / JPEG / JFIF | Cameras, web downloads, scans |
| Lossless / transparent | PNG | Screenshots, logos, UI mockups |
| Modern web | WebP, AVIF | Chrome / Firefox web exports |
| Apple / mobile | HEIC, HEIF | iPhone & iPad photos (iOS 11+) |
| High-quality scans | TIFF / TIF | Flatbed scans, archival, fax |
| Legacy raster | BMP, GIF, ICO, PPM | Old Windows apps, web icons |
| Layered / editor | PSD, XCF | Photoshop, GIMP exports |
| Camera RAW (30+) | CR2, CR3, CRW, NEF, ARW, DNG, RAF, ORF, RW2, PEF, MRW, X3F, 3FR, DCR, ERF, MOS | Canon, Nikon, Sony, Fujifilm, Olympus, Panasonic, Pentax, Sigma, Hasselblad, Kodak, Epson, Leaf |
| Vector / publishing | EPS | Adobe Illustrator, technical drawings |
Need a single-source-format page instead? See JPG to PDF, PNG to PDF, HEIC to PDF, TIFF to PDF, or WebP to PDF.
| Preset | Dimensions | Typical use |
|---|---|---|
| A4 (default) | 210 × 297 mm (8.27 × 11.69") | ISO 216 standard outside US/Canada — most printers worldwide |
| Letter | 8.5 × 11" (216 × 279 mm) | ANSI A — default for US/Canada printers and most US forms |
| Legal | 8.5 × 14" (216 × 356 mm) | US contracts, legal filings, ballots |
| Tabloid / Ledger | 11 × 17" (279 × 432 mm) | US large-format prints, spreadsheets, posters |
| A3 | 297 × 420 mm | ISO large-format (2× A4) — drawings, posters |
| A5 / B5 | 148 × 210 mm / 176 × 250 mm | Booklets, zines, EU paperbacks |
| Executive | 7.25 × 10.5" | Business letterhead, US executive correspondence |
| Original | Page = image | Photo books with no margins — page resizes per image |
| Setting | Behavior | When to pick it |
|---|---|---|
| Contained (default) | Whole image visible, white bars fill leftover space | Documents, scans, screenshots, anything where you cannot lose edge content |
| Cover | Image is scaled up to fill the page and the overhang is cropped | Photo books where you want full-bleed pages and don't mind trimming edges |
Pair Cover + Original paper size for edge-to-edge photo prints. Pair Contained + A4 + Narrow margin for mixed-size scans where every pixel must survive.
Both. The Combine setting defaults to Single PDF, which stitches every uploaded image into one multi-page PDF in the order you arranged thumbnails. Switch to Individual PDFs to get a ZIP containing one PDF per image — handy when each scan represents a different document (e.g., separate invoices). If you only want to merge a stack of PDFs that already exist, use Merge PDF instead.
By default the Image Quality slider is 75%, which re-encodes embedded JPEGs at a high-quality level visually indistinguishable from the source at normal viewing distance — Adobe and most modern viewers do similar by default. For archival scans or print-shop work, drag the slider to 100% to keep images near-lossless. For email-friendly bundles, drop to 60–70% to shrink file size dramatically with minimal visible loss.
HEIC is iOS-native (since iOS 11 in 2017) but support outside Apple's ecosystem is partial — Windows 10 needs the HEIF Image Extension from the Microsoft Store, many Linux distros and older Android builds can't preview HEIC at all, and most email clients show "no preview." Wrapping HEIC photos in PDF removes that friction: PDF readers are pre-installed everywhere. If you want to keep image files instead of a PDF, convert with HEIC to JPG first.
A4 (210 × 297 mm, ISO 216) is the default everywhere except the US and Canada, which use Letter (8.5 × 11", ANSI A). A4 is about 6 mm narrower and 18 mm taller than Letter. If your recipient will print in North America, pick Letter; if you're sending to the rest of the world, A4 is safer. When unsure, A4 is the published default of most online PDF tools and is accepted by most US government forms too.
Two options: set Image placement to Cover (fills the page and crops edges), or set Paper size to Original (each PDF page matches the image's pixel dimensions, leaving no leftover space). Combine Original + No margin for an edge-to-edge photo book where every page is sized exactly to its image. Note that with Cover, parts of tall portrait photos may be cropped on landscape pages — orientation must match.
Yes — over 30 RAW formats are decoded server-side, including Canon CR2/CR3/CRW, Nikon NEF, Sony ARW, Adobe DNG, Fujifilm RAF, Olympus ORF, Panasonic RW2, Pentax PEF, Sigma X3F, Hasselblad 3FR, Kodak DCR, Epson ERF, Leaf MOS, and Minolta MRW. RAW is decoded with default white-balance and a baseline JPEG render is embedded in the PDF — fine for proofs and contact sheets, but for finished prints you'll want to develop RAWs in Lightroom or Darktable first and convert the exported JPEGs.
By default Image Transparency = Unchanged, so PNG transparency is preserved in the PDF (most modern viewers render it over a white page background, which looks correct). Set it to Removed to flatten transparency onto a white background before embedding — pick this if you're sending the PDF to a print shop, since some commercial RIPs render transparency incorrectly. PSD and XCF transparency is handled the same way.
There is no hard image count, page count, or per-file size cap. Hundreds of images are fine; just be aware that a 300-image PDF will be tens to hundreds of MB and will take longer to upload than it does to convert. If the resulting PDF is too large to email or upload (Gmail caps attachments at 25 MB), run it through Compress PDF afterwards or drop the Image Quality slider to 60% before converting.
Yes. Use PDF to JPG to rasterize each PDF page back to a JPEG image at your chosen DPI. Note that this is a re-render, not a recovery of the original image bytes — if you need the exact original files, keep a backup before converting to PDF.