JPG to PDF Converter — Free, No Watermark




No watermark, no upload, no signup. Your images are read and combined inside your own browser — they never touch a server, which is also why this works on files you would not want to upload anywhere.

How to convert JPG to PDF

  1. Click the file box and select your images. Hold Ctrl (or Cmd on Mac) to pick several at once.
  2. Choose a page size. A4 and US Letter add white space around the image; Fit to image makes each PDF page exactly the shape of its photo.
  3. Pick a margin. Use None for full-bleed photos, Small for documents.
  4. Click Create PDF. The file downloads immediately.

Images are added in the order you selected them, one per page.

Why your scanned document looks blurry in a PDF — and how to fix it

A PDF page has a fixed physical size, so the sharpness of an image inside it depends on how many pixels are packed into each printed inch. That is the dpi. A 1,000-pixel-wide photo stretched across an A4 page (210 mm, about 8.27 in) lands at roughly 120 dpi, which looks soft in print even though it looked fine on screen.

For a document you intend to print or submit, aim for 300 dpi: about 2,480 pixels across for A4, or 2,550 for US Letter. If your source photo is smaller than that, no converter can add detail that was never captured — rescan or rephotograph it larger instead. Choosing Fit to image avoids the problem entirely, because the page shrinks to the image rather than the image stretching to the page.

Resolution reference: what your image needs to be

Because a PDF page has a fixed physical size, sharpness depends on pixels per printed inch. These are the pixel dimensions required to fill a page at each quality level:

Page size Physical size 150 dpi (draft) 300 dpi (print standard) 600 dpi (archival)
A4 portrait 210 × 297 mm 1,240 × 1,754 2,480 × 3,508 4,961 × 7,016
US Letter portrait 8.5 × 11 in 1,275 × 1,650 2,550 × 3,300 5,100 × 6,600
A5 148 × 210 mm 874 × 1,240 1,748 × 2,480 3,496 × 4,961
A3 297 × 420 mm 1,754 × 2,480 3,508 × 4,961 7,016 × 9,921
4 × 6 photo 4 × 6 in 600 × 900 1,200 × 1,800 2,400 × 3,600

Two useful reference points. A 12-megapixel phone photo (about 3,024 × 4,032) comfortably exceeds 300 dpi for a full A4 page, so photographing a document with a modern phone is fine. A scan made at 150 dpi does not — it lands at roughly half the linear resolution needed, and no converter can recover detail that was never captured. If a document matters, scan it at 300 dpi or higher in the first place.

Choosing the page size

Setting What it does Use it for
A4 / US Letter Fixed page; image is centred and scaled to fit, leaving white space where the aspect ratios differ Anything printed or submitted — forms, applications, receipts, scanned paperwork
Fit to image Each page takes the exact proportions of its own photo; no white space, no letterboxing Photo albums, screenshots, portfolios, comics — anything read on screen

Fit to image also sidesteps the dpi problem entirely: since the page shrinks to the image rather than the image stretching to the page, the effective resolution stays whatever the source was.

Margins, and why paperwork needs them

Most consumer printers cannot print to the paper edge; they reserve an unprintable margin of roughly 3–5 mm. A full-bleed PDF sent to such a printer gets either clipped or silently scaled down.

  • None — correct for on-screen use and for photo printing at a lab that trims.
  • Small (10 mm) — the safe default for documents. Clears the unprintable region on essentially every desktop printer.
  • Large (20 mm) — for anything that will be hole-punched, stapled or bound, where the inner margin is lost to the binding.

File size, and the compression trade-off

Images are re-encoded as JPEG at quality 0.92 when written into the PDF. That is deliberately near the top of the useful range: above roughly 0.95 the file grows quickly with no visible gain, and below about 0.80 compression artefacts start showing around text and hard edges — exactly where a scanned document is judged.

Rough expectations per page at A4, 300 dpi:

Content type Typical size per page Note
Text document, flat white background 200–600 KB Compresses well — large uniform areas
Photograph, detailed 1–3 MB Little redundancy to exploit
Screenshot with UI 300 KB–1 MB Depends on gradients and imagery

If you need a smaller file, the effective lever is source resolution, not compression: a 20-page PDF built from 12 MP photos will be large no matter how it is encoded. Downscale the images to about 2,480 px on the long edge first and the result stays print-sharp at a fraction of the size.

One thing to know: this produces an image-based PDF, not a searchable one. The text in your photos is pixels, so it cannot be selected, searched or copied. Making it searchable requires OCR, which is a separate step.

HEIC, and why iPhone photos sometimes fail

iPhones shoot HEIC by default. Unlike JPEG and PNG, HEIC decoding is not universally available in browsers, and this tool can only use what your browser can decode.

Browser HEIC in-page What to do
Safari (macOS, iOS) Supported Works directly
Chrome, Edge, Brave (Chromium) Generally not supported Use Safari, or change the iPhone setting below
Firefox Not supported As above

The durable fix is on the phone: Settings → Camera → Formats → Most Compatible, which shoots JPEG instead. For photos already taken, sharing them via AirDrop or email with “Automatic” conversion, or opening and re-exporting them from the Photos app, produces JPEGs. The tool reports by name any file it could not decode rather than skipping it silently.

Troubleshooting

Symptom Cause Fix
Pages in the wrong order Order follows your file selection, which the operating system may sort unexpectedly Rename files 01, 02, 03 and select them together
Image looks soft in print Source resolution below 300 dpi for the page size See the resolution table above, or switch to Fit to image
Large white borders Image aspect ratio differs from the fixed page Use Fit to image, or set margin to None
Photo rotated the wrong way Orientation forced rather than detected Set orientation to Auto per image
Browser stalls on a big batch Device memory — all images are decoded in-browser Split into batches of 50–100 pages
Transparent PNG gained a white background PDF pages have no transparency; it is flattened onto white Expected. Flatten onto your preferred colour first if it matters

Frequently asked questions

Does this add a watermark?

No. The PDF contains only your images.

Is there a file size or page limit?

No limit imposed by us. Very large batches are limited only by your device memory — a few hundred photos is normally fine.

Are my images uploaded to a server?

No. Conversion happens entirely in your browser using the FileReader and Canvas APIs. Nothing is transmitted.

Can I combine several JPGs into one PDF?

Yes — that is the default. Select all of them and each becomes one page in the order chosen.

Does it work with PNG, WebP or HEIC?

PNG and WebP work everywhere. HEIC (the iPhone default) works if your browser can decode it — Safari can, most others cannot. If a HEIC file fails, set your iPhone to Most Compatible in Settings → Camera → Formats, or convert to JPG first.

Can I reorder the pages?

Order follows your selection. To control it precisely, rename the files 01, 02, 03 first and select them together.

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