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JPG to PDF under 500 KB

To make a PDF under 500 KB, PixelFit compresses the JPG to at most 499,262 bytes and wraps it in a one-page PDF with about 738 bytes of PDF structure, 500,000 bytes or less in total. Measured: an A4 scan at 150 DPI fits at quality 91; a 4:3 photo at about 1,601 × 1,200 pixels (quality 75).

PDF under 500 KB

PDF · under 500 KB (at most 500,000 bytes) · original pixel size · white background

PixelFit aims at 500,000 bytes or less, so the file passes whether the form counts 1 KB as 1,000 or 1,024 bytes.

Fit, background and padding white background · page the size of the picture

Saving presets is part of Pro.

Pick a photo to fit it to under 500 KB (at most 500,000 bytes).

The result appears here: the exact byte count, pixel size and quality, the size before and after, a preview and a download button.

Where the 500 KB go in a JPG-to-PDF file

Of the 500,000 bytes that pass as 500 KB under both KB definitions, PDF structure takes 738 bytes for one A4 page (computed with PixelFit's own writer), leaving 499,262 bytes, 99.8 %, for the JPEG; ten pages leave 49,475 bytes each.

For one photo, quality 75 allows 1,601 × 1,200 pixels and quality 90 1,257 × 942; a full 12 MP frame must be scaled down first, which the tool does for you.

How many pages fit in a 500 KB PDF

The 500,000 bytes of 500 KB, less 738 bytes of PDF structure for the first page and about 501 for each extra one, shared evenly.

* = extrapolated beyond our scans (3000 px long edge, 256 DPI on A4).
PagesJPEG bytes per pageMax A4 DPI at q50Max A4 DPI at q75A4 at 150 DPI
1 page 499,262 310 DPI* 227 DPI quality 91
2 pages 249,382 196 DPI 146 DPI quality 73
3 pages 166,087 148 DPI 112 DPI quality 49
5 pages 99,451 105 DPI 81 DPI no: 1.3× over at q30
10 pages 49,475 69 DPI 55 DPI no: 2.5× over at q30
20 pages 24,486 47 DPI 37 DPI no: 5.1× over at q30
50 pages 9,491 29 DPI 23 DPI no: 13.2× over at q30
100 pages 4,492 20 DPI 15 DPI no: 27.9× over at q30

Make a PDF under 500 KB →

Phone photos in one PDF under 500 KB

Largest 4:3 photo per page, in pixels, when 1 to 10 photos share 500,000 bytes; "full" means a 12 MP phone photo keeps all its pixels (the tool never enlarges).

PhotosQuality 60Quality 75Quality 90
1 photo 1,852 × 1,389 1,601 × 1,200 1,257 × 942
2 photos 1,297 × 972 1,126 × 844 892 × 669
3 photos 1,065 × 798 926 × 694 726 × 544
5 photos 828 × 621 715 × 536 560 × 420
10 photos 584 × 438 507 × 380 395 × 296

A4 and Letter pixel sizes against 500 KB

One typed page per DPI: its pixels, the quality it gets alone in 500 KB, and how many fit at quality 75.

DPIA4 pixelsOne A4 page under 500 KBLetter pagePages at q75
72 DPI 595 × 842 quality 95+ quality 95+ 6
100 DPI 827 × 1169 quality 95+ quality 95+ 3
150 DPI 1240 × 1754 quality 91 quality 91 1
200 DPI 1654 × 2339 quality 81 quality 82 1
300 DPI 2480 × 3508 quality 53 quality 54 none

Readable pages and photos in 500 KB

At 500 KB, 2 typed A4 pages at 150 DPI fit at quality 50 or better (1 at 200 DPI), and so does 1 photo of 1600 × 1200 at quality 70.

One page alone gets quality 91 at 150 DPI, quality 81 at 200 DPI and quality 53 at 300 DPI.

One image free, several merged with Pro

Free: each image becomes its own one-page PDF under 500 KB. Pro: several images merged into one PDF under 500 KB, on your device; 5 pages get 99,451 bytes of JPEG each.

How to turn a JPG into a PDF under 500 KB

  1. Open the tool above

    Preset: PDF output, at most 500 KB.

  2. Add the JPG

    Drop, paste or pick it (PNG, WebP and HEIC work too).

  3. Choose the page

    Keep the picture's own size or fit it on A4 or Letter.

  4. Download

    name-500kb.pdf arrives with its exact byte count (500,000 bytes or less).

Forms with a 500 KB PDF limit

Upload specs in our dataset with a PDF limit of exactly 500 KB. Verify with the official notice before you submit.

500 KB PDF uploads

Sources

  1. Measured by PixelFit with sharp 0.35.5 / libvips 8.18.7 on 31 October 2026.
  2. Samples, Wikimedia Commons, checked 31 October 2026: typed page (public domain) commons.wikimedia.org/w/index.php?curid=194775753; landscape (CC0 1.0) commons.wikimedia.org/w/index.php?curid=154070378
  3. Paper sizes, Markus Kuhn, checked 31 October 2026: cl.cam.ac.uk/~mgk25/iso-paper.html
  4. PDF format, Library of Congress, checked 31 October 2026: loc.gov/preservation/digital/formats/fdd/fdd000474.shtml

Frequently asked questions

How do I convert a JPG to PDF under 500 KB?

Drop the JPG into the tool on this page, preset to PDF under 500 KB: the picture is compressed to 499,262 bytes or less, so the PDF ends at or below 500,000 bytes.

Can I convert JPG to PDF for free?

Yes, one image per PDF, with no upload. Under 500 KB a 4:3 photo keeps 1,601 × 1,200 pixels at quality 75; merging several JPGs is Pro.

How many pages fit in a 500 KB PDF?

About 2 typed A4 pages scanned at 150 DPI at quality 50 or better, or 1 at 200 DPI; 1 photo of 1600 × 1200 at quality 70.

What DPI should a scan have for a 500 KB PDF?

For one typed A4 page, at most 310 DPI (extrapolated) at quality 50, or 227 DPI at quality 75, under 500 KB; of the usual 72 to 300 DPI settings, 300 DPI.

Why is the PDF bigger than my JPG?

A PDF wraps the JPEG in page, image and cross-reference objects: 738 bytes for one page in PixelFit's writer, about 501 more per added page.

Related

Other PDF size limits

More for 500 KB

Pixel sizes that fit 500 KB

Founder price

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