Updated 31 October 2026 · how we check

JPG to PDF under 1 MB

To make a PDF under 1 MB, PixelFit compresses the JPG to at most 999,260 bytes and wraps it in a one-page PDF with about 740 bytes of PDF structure, 1,000,000 bytes or less in total. Measured: an A4 scan at 150 DPI fits at quality 95; a 4:3 photo at about 2,322 × 1,741 pixels (quality 75).

PDF under 1 MB

PDF · under 1 MB (at most 1,000,000 bytes) · original pixel size · white background

PixelFit aims at 1,000,000 bytes or less, so the file passes whether the form counts 1 MB as 1,000,000 or 1,048,576 bytes.

Choose photos or drop them here JPG, PNG, WebP, GIF, BMP, AVIF or SVG, and HEIC where the browser opens it. You can also paste. Nothing is uploaded.

Max size (KB)

Min size (KB)

Format

Width

Height

Unit

DPI

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

Fit to the size

Background

PDF page

If the file ends up below the minimum, pad it with an invisible JPEG comment block (the picture is not changed).

Saving presets is part of Pro.

Pick a photo to fit it to under 1 MB (at most 1,000,000 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 1 MB go in a JPG-to-PDF file

Of the 1,000,000 bytes that pass as 1 MB whether a megabyte is 1,000,000 or 1,048,576 bytes, PDF structure takes 740 bytes for one A4 page (computed with PixelFit's own writer), leaving 999,260 bytes, 99.9 %, for the JPEG; ten pages leave 99,473 bytes each.

A full 12 MP phone photo is scaled down first: at quality 75 a 4:3 photo keeps 2,322 × 1,741 pixels, at quality 90 1,801 × 1,350.

How many pages fit in a 1 MB PDF

The 1,000,000 bytes of 1 MB, less 740 bytes of PDF structure for the first page and about 502 for each extra one, shared evenly.

* = extrapolated beyond our scans (3000 px long edge, 256 DPI on A4).
Pages	JPEG bytes per page	Max A4 DPI at q50	Max A4 DPI at q75	A4 at 150 DPI
1 page	999,260	487 DPI*	350 DPI*	quality 95+
2 pages	499,382	310 DPI*	227 DPI	quality 91
3 pages	332,753	237 DPI	176 DPI	quality 82
5 pages	199,451	168 DPI	126 DPI	quality 61
10 pages	99,473	105 DPI	81 DPI	no: 1.3× over at q30
20 pages	49,486	69 DPI	55 DPI	no: 2.5× over at q30
50 pages	19,491	41 DPI	33 DPI	no: 6.4× over at q30
100 pages	9,491	29 DPI	23 DPI	no: 13.2× over at q30

Make a PDF under 1 MB →

Phone photos in one PDF under 1 MB

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

Photos	Quality 60	Quality 75	Quality 90
1 photo	2,703 × 2,027	2,322 × 1,741	1,801 × 1,350
2 photos	1,853 × 1,389	1,602 × 1,201	1,257 × 942
3 photos	1,502 × 1,126	1,299 × 974	1,030 × 772
5 photos	1,160 × 870	1,014 × 760	797 × 597
10 photos	828 × 621	715 × 536	560 × 420

A4 and Letter pixel sizes against 1 MB

One typed page per DPI: its pixels, the quality it gets alone in 1 MB, and how many fit at quality 75.

DPI	A4 pixels	One A4 page under 1 MB	Letter page	Pages at q75
72 DPI	595 × 842	quality 95+	quality 95+	12
100 DPI	827 × 1169	quality 95+	quality 95+	7
150 DPI	1240 × 1754	quality 95+	quality 95+	3
200 DPI	1654 × 2339	quality 93	quality 94	2
300 DPI	2480 × 3508	quality 82	quality 82	1

Readable pages and photos in 1 MB

At 1 MB, 5 typed A4 pages scanned at 150 DPI fit at quality 50 or better, and 3 at 200 DPI: enough for a short multi-page document. 2 photos of 1600 × 1200 at quality 70 also fit.

A single page at 300 DPI gets quality 82; several pages at that resolution need a lower quality or a lower DPI. Not one full-size 12 MP photo (4032 × 3024) fits 1 MB at quality 60, so the tool scales it first.

One image free, several merged with Pro

Free: each image becomes its own one-page PDF under 1 MB. Pro: several images merged into one PDF under 1 MB, on your device; 10 pages get 99,473 bytes of JPEG each.

How to turn a JPG into a PDF under 1 MB

Open the tool above

Preset: PDF output, at most 1 MB.
Add the JPG

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

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

name-1mb.pdf arrives with its exact byte count (1,000,000 bytes or less).

Forms with a 1 MB PDF limit

Upload specs in our dataset with a PDF limit of exactly 1 MB. Verify with the official notice before you submit.

1 MB PDF uploads

Sources

Measured by PixelFit with sharp 0.35.5 / libvips 8.18.7 on 31 October 2026.
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
Paper sizes, Markus Kuhn, checked 31 October 2026: cl.cam.ac.uk/~mgk25/iso-paper.html
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 1 MB?

Drop the JPG into the tool on this page, preset to PDF under 1 MB: the picture is compressed to 999,260 bytes or less, so the PDF ends at or below 1,000,000 bytes.

Can I convert JPG to PDF for free?

Yes, one image per PDF, with no upload. Under 1 MB a 4:3 photo keeps 2,322 × 1,741 pixels at quality 75; merging several JPGs is Pro.

How many pages fit in a 1 MB PDF?

About 5 typed A4 pages scanned at 150 DPI at quality 50 or better, or 3 at 200 DPI; 2 photos of 1600 × 1200 at quality 70.

What DPI should a scan have for a 1 MB PDF?

For one typed A4 page, at most 487 DPI (extrapolated) at quality 50, or 350 DPI (extrapolated) at quality 75, under 1 MB; 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: 740 bytes for one page in PixelFit's writer, about 502 more per added page.

Other PDF size limits

JPG to PDF under 800 KB 4 A4 pages at 150 DPI
JPG to PDF under 700 KB 4 A4 pages at 150 DPI
JPG to PDF under 600 KB 3 A4 pages at 150 DPI
JPG to PDF under 1.5 MB 8 A4 pages at 150 DPI
JPG to PDF under 2 MB 11 A4 pages at 150 DPI
JPG to PDF under 3 MB 17 A4 pages at 150 DPI

More for 1 MB

Compress an image to 1 MB Same limit, image output
JPG to PDF: what changes Format facts
Image resizer with KB target Any size and format

Other formats to PDF

Pixel sizes that fit 1 MB

2000×2000 square about 966 KB as a quality-75 JPG
2400×1600 landscape about 931 KB as a quality-75 JPG
2560×1440 (QHD) about 897 KB as a quality-75 JPG

Index

PDF under a size: all 21 pages