Convert JPG to PDF
under 30KB
Shrink a scan or photo into a single PDF that lands under 30KB — the kind of ultra-tight limit strict government forms and old upload portals still enforce. This page opens with the 30 KB target already selected, so you just add an image and convert. Need it even smaller? It reaches jpg to pdf 10 kb and 20KB territory too.
Need the images smaller first? Use the image compressor to hit a KB limit, or the image converter to turn HEIC or PNG into JPG before you build the PDF.
Kodotools Team · Last updated: January 2026 · Files stay on your device
About this tool
A free, browser-based converter that makes a JPG to PDF under 30KB — built for the strictest upload caps. The 30KB target is chosen for you; drop it lower for 10KB or 20KB. No file ever leaves your device.
Who needs this?
- Anyone told to upload a signature or document PDF under 30KB
- Exam and government forms that cap files at 10–30KB
- People shrinking a single scan or ID to the smallest usable PDF
Drop your JPG images here
or click to browse · add as many as you like
Reading your images
Loading the selected files locally. This can take a moment for large photos.
0 images ready
Drag to reorder — page order follows the list.
Preview
How each page will look in the PDF
Target PDF size
What fits in a 30KB PDF?
30KB is a very tight budget, so this target works best for one simple page: a signature, a typed document, a clean black-and-white scan, or a single ID photo. Text and line art stay perfectly legible at 30KB — even at 10KB — because they compress well. A busy, full-colour photo can reach 30KB but will visibly soften, so crop out empty margins first and convert one image at a time for the cleanest result.
Have a little more headroom? The same engine powers presets for 80KB, below 100KB, and the main JPG to PDF converter.
How JPG to PDF at an exact KB works
A PDF built from photos is mostly just the images inside it, so its size is set almost entirely by them. To get a JPG to PDF under 30KB, the tool aggressively lowers JPEG quality and scales the image down until the whole PDF measures below 30KB. Everything is measured live in your browser, so you see the real size before you download.
Add your images
Drop one JPG or many. Reorder them so the pages come out in the right sequence.
Set the target
Pick a page size and a KB limit — 30KB is preselected, or type 10 or 20 for even smaller.
Convert & download
Hit convert. See the final size, then download your PDF. Done.
Why set the PDF size in KB?
Most "convert jpg to pdf" tools give you whatever file size they feel like. That fails the moment a portal caps uploads at a fixed number. Setting the size in KB is what turns a generic converter into something you can actually submit.
- Job & government forms: many require a document PDF under 100KB, 150KB, or 300KB.
- Visa & university portals: common ceilings are 300KB, 400KB, 450KB and 500KB.
- Very strict uploads: some ask for a JPG to PDF at 80KB or even below — this tool can hit those too.
- Email & chat limits: a smaller PDF sends faster and won't bounce on attachment caps.
Kodotools vs typical JPG-to-PDF sites
| Feature | Kodotools | Typical online tools |
|---|---|---|
| Exact KB target | Yes — type any KB | Rarely — fixed output |
| Files uploaded to a server | Never — 100% browser | Usually yes |
| Multiple images in one PDF | Yes, reorderable | Sometimes |
| Signup / watermark | Free, no signup | Varies |
Tips for a small, readable PDF
Keep text legible at 80KB
For a scanned document, crop out empty margins before converting — the tool then spends the KB budget on the text, not blank space, so a JPG to PDF at 80KB stays readable.
A4 vs "fit to image"
Choose A4 or Letter when a form expects a standard page. Use Fit to image for photos, ID cards, or receipts where you don't want white borders.
Very small targets
A busy, colourful photo can't always reach a tiny limit without going blurry. If the PDF stays above target, the tool tells you and gives you the smallest version it could make.
Compress the image first
Starting from a huge phone photo? Run it through the image compressor first for the cleanest result at strict limits.
FAQ
Common questions
How do I make a JPG to PDF under 30KB?
Add your JPG (this page already has the 30 KB target selected), then press Convert to PDF. The tool compresses the image hard until the finished PDF is under 30KB and shows the exact size before you download.
Can I make an even smaller PDF, like 10KB?
Yes. Pick the 10 KB or 20 KB preset, or type your own number. Signatures, typed documents and clean scans reach 10KB while staying perfectly legible.
Why does my photo look blurry at 30KB?
A busy, full-colour photo needs more than 30KB to stay sharp, so it softens at this target. For the cleanest result, convert one image at a time and crop out empty margins first — or allow a slightly higher limit like 80KB.
Should I combine multiple images at 30KB?
For such a tight target, one page per PDF works best. Merging several images into one 30KB file leaves only a few KB per page, which blurs detail. Keep multi-image PDFs to higher targets.
Are my files uploaded to a server?
No. The whole JPG to PDF conversion runs locally in your browser. Your images and the finished PDF never leave your device.
Does it work on a phone?
Yes. It runs in Android and iOS browsers, so you can make a sub-30KB PDF straight from photos on your phone.
Guides
Real use-cases, step by step
Practical walk-throughs for the most common forms with strict size limits.
Ready to make a PDF under 30KB?
Jump back to the tool, set your KB target, and download your PDF in one pass.
Convert to PDF →