Convert JPG to PDF under 50 KB
Turn a photo or a scan into a PDF no larger than 50 KB. The limit is already set; add the picture and download.
- Runs in your browser
- Nothing is uploaded
- No sign-up
- Up to 20 pages in one PDF
Drag & drop your images here
or tap to browse · you can also paste from the clipboard
JPG · PNG · WebP · GIF · BMP · AVIF · SVG · up to 50 MB each · up to 20 files
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Processed image will appear here.
How to use the JPG to PDF 50 KB converter
The limit is already set to 50 KB, so add your picture and download the PDF. Keep it to one page and crop it close to the document first. The note under the preview tells you the quality used and warns you when the page has become too small for print.
- Add your pictureOne page is best at this size. Crop it close to the document first.
- Check the noteIt says how the picture was fitted and whether small print may suffer.
- Download the PDFUnder 50 KB, counted the strict way.
About this tool
50 KB is a tight limit for a PDF. It holds one page comfortably if the page is simple: a signature, a passport-size photo, an ID card, a short certificate. A full sheet of small print squeezed into 50 KB comes out too coarse to read, and no converter can change that; the bytes are not there.
This page spends the 50 KB as well as it can. The picture is saved at the highest JPEG quality that fits, and its pixel size is reduced only as far as needed. When the result is small enough that print may not survive, the note under the preview says so and gives the width in pixels, so that you can judge before you submit anything.
You can help it a great deal. Crop the picture to the edges of the document first, so that no bytes are spent on the table around it, and keep to one page. If your form allows more than 50 KB, type the larger number: every extra kilobyte goes into sharpness.
What you get
- Limit preset to 50 KB, and editable
- Highest quality that fits, found automatically
- Counted at 1000 bytes to the KB, so it passes either way
- Tells you the page width in pixels when it gets small
- A4 by default; other paper sizes available
- Nothing is uploaded
When to use the JPG to PDF 50 KB converter
A signature or a photo as a PDF
Forms that want the signature or the passport photo as a PDF and cap it at 50 KB are the natural fit for this limit.
An identity card
The front of an ID card, cropped to the card, has little enough on it to stay clear in 50 KB.
A short certificate
A certificate with a title, a name and a few lines of large type reads well; one packed with small print does not.
A receipt or a token slip
A small printed slip photographed close up fills the page with large characters, which survive compression.
What 50 KB gives a page of text
| Pages in the PDF | Share for each page | Width of a full page of text | What reads |
|---|---|---|---|
| 1 | About 50 KB | About 570 px | Headings and large type; body text is hard to read |
| 2 | About 25 KB | About 390 px | Titles only |
| 3 | About 16 KB | About 300 px | The shape of the page; no text |
| 5 | About 10 KB | About 230 px | Not usable for documents |
How it works
At 50 KB the structure of the PDF itself matters. A one-page file needs about 700 bytes for its catalogue, page list, page object and cross-reference table, and what is left is the picture's budget. The picture starts at no more than 16 pixels for every byte of that budget, about 0.8 megapixels, and is encoded at falling qualities until it fits. The search does not go below quality 25: under that, JPEG breaks a page of text into blocks, so pixels are given up instead and the search runs again at the smaller size.
The widths in the table are from a test with a full A4 page of text scanned at 2480 by 3508 pixels. That is close to a worst case, because text edges are the most expensive thing for JPEG to store. A page that is mostly white, a clean screenshot or a signature on plain paper does noticeably better, and a photo taken in dim light, full of grain, does worse. The profile a browser adds to the JPEGs it writes is removed before the picture goes into the PDF, which hands a few hundred bytes back to the picture.
Common problems and how to fix them
- The text in the PDF is too blurred to read
- 50 KB cannot hold a full page of small print. Crop to the part of the page that matters, or use a larger limit if the form allows one. Photographing only the relevant section, close up, often solves it.
- The note warns that the page is only a few hundred pixels across
- That is the size the picture had to come down to. It is a warning, not an error: open the PDF, and if you can read what you need to, it is fine to use.
- The PDF came out well under 50 KB
- The picture was small or simple to begin with, and is already stored at the top quality. There is nothing better to spend the remaining bytes on.
- My form rejects the file as too large
- Check the unit. Some forms mean 50 KB for all attachments together, and a few show the limit in bytes. The size of the PDF in bytes is given in the note under the preview.
Frequently asked questions
Can a full page of text really fit in 50 KB?
It fits, but it will not read well. In a test, a full A4 page of text came out about 570 pixels wide at 50 KB: headings and large type are clear, ordinary body text is hard to read. For a page of small print, ask whether the form allows 100 KB or more. If it does not, crop to the part that matters.
How do I get the best result at 50 KB?
Use one picture, cropped tight to the document with the Image Cropper. Photograph it flat, in even light, on a plain background: shadows and texture cost bytes. A black-and-white document is cheaper to store than a colour photo of the same size.
Why is the file shown as 48.8 KB and not 50?
The limit is counted as 50,000 bytes, which is 48.8 KB in the units of 1024 that file managers use. A form that counts 1000 bytes to the kilobyte and one that counts 1024 both accept it.
Can I put two or three pages in a 50 KB PDF?
You can add them, and the 50 KB is shared between the pages, so each gets half or a third. At that size each page is only around 300 to 400 pixels wide, which suits a signature or a small photo and nothing with text.
Is 50 KB counted as 50,000 or 51,200 bytes?
As 50,000. A file that fits that count also fits 51,200, so it passes a form whichever definition it uses.
Does the PDF contain my photo's location data?
No. The picture is encoded afresh for the PDF and carries no EXIF data, and the PDF has no author, date or program name written into it.
Would a black-and-white PDF be smaller?
Somewhat. Colour is a minor part of a JPEG's size, so the saving is modest, but it is real. Convert the picture with the Grayscale tool first and add the result here.