Compress PDF to 20 KB Online
Instantly compress your PDFs, scans, and forms to under 20 KB while preserving document quality.
Upload a PDF to Compress to 20 KB
Drag & drop your file here, or click to browse
Choose PDF FileHow to Compress a PDF to 20 KB in 3 Easy Steps
20 KB is best for: Signature & ID scans. Upload your PDF and get a copy under 20 KB in seconds.
Upload Your PDF
Click Choose PDF File or drag your PDF into the box. Files up to 50 MB and 100 pages are supported.
Check the Target Size
The target is already set to 20 KB. Pick another size button or type your own if your form has a different limit.
Compress and Download
Click Compress PDF. When it's done, click Download to save your smaller PDF.
Choose the Right PDF Size
Need a different limit? Every size below opens with its target already set.
| Target size | Best for |
|---|---|
| 20 KB (this page) | Signature & ID scans |
| Compress PDF to 25 KB | Small proof documents |
| Compress PDF to 30 KB | One-page certificates |
| Compress PDF to 40 KB | Single-page forms |
| Compress PDF to 50 KB | Exam & job forms |
| Compress PDF to 75 KB | Short letters & forms |
| Compress PDF to 100 KB | Resumes & 2–3 page forms |
| Compress PDF to 150 KB | Longer resumes |
| Compress PDF to 200 KB | Multi-page applications |
| Compress PDF to 250 KB | Certificates & mark sheets |
| Compress PDF to 300 KB | Reports with images |
| Compress PDF to 400 KB | Scanned multi-page files |
| Compress PDF to 500 KB | Visa & admission documents |
| Compress PDF to 1 MB | Email & job portals |
| Compress PDF to 2 MB | Online portals & uploads |
| Compress PDF to 3 MB | Image-heavy PDFs |
| Compress PDF to 4 MB | Long scanned documents |
| Compress PDF to 5 MB | Email attachments |
| Compress PDF to 10 MB | Large files & catalogues |
Why Use Toolszu to Compress PDF to 20 KB
Made for strict upload limits on forms and portals.
Hits Your Size Limit
We search for the best quality that still fits — as close to the target as possible without going over.
Text Stays Selectable
The normal method only shrinks images, so text, links and fonts stay sharp and selectable. Pages are saved as images only when that's the only way to fit.
Any Size You Need
This page starts at 20 KB, but you can pick any other size from 10 KB to 100 MB in one click.
Same Pages and Layout
Page size, page order and layout never change — only the file gets smaller.
Private and Secure
Encrypted upload, processed in an isolated sandbox and deleted automatically within 1 hour (or right away with Delete now).
Free, No Watermark
No sign-up, no premium plan and nothing added to your PDF.
When Do You Need a 20 KB PDF?
20 KB is best for: Signature & ID scans.
ID Proofs & Signatures
Upload a scanned ID card, signature page or photo proof where the form allows only 20 KB.
Exam & Admission Forms
Online exam and admission portals often ask for tiny supporting files like a 20 KB certificate or caste/income proof.
One-Page Declarations
Self-declarations, undertakings and NOC letters usually fit easily in 20 KB.
Receipts & Small Proofs
Fee receipts, address proofs and payment slips made into a lightweight 20 KB PDF.
Scholarship Uploads
Scholarship and fee-concession portals often accept only very small proofs such as income or bonafide certificates.
Phone Scans
Turn a photo of a document taken on your phone into a tiny PDF that fits strict upload boxes.
Tips to Get Your PDF Under 20 KB
- Keep it to one page. Remove extra pages with Split PDF — fewer pages means much better quality.
- Scanning? Scan in black & white at 150–200 DPI. Colour scans are far bigger.
- Photo of a document? Crop away the table and background first, then convert with JPG to PDF.
- Need selectable text? At very small sizes pages may be saved as images. If the portal allows it, choose a bigger size.
Frequently Asked Questions
Quick answers about compressing a PDF to 20 KB.
Upload your PDF, check that the target says 20 KB and click Compress PDF. When it's ready, click Download. It's free and takes a few seconds.
A 20 KB limit is best for a single page. A simple one-page scan or form usually fits. Two short pages may fit if they are mostly plain text, but files with photos or many pages are unlikely to get this small.
Text stays readable at 20 KB. To fit, pages are often saved as grayscale or sharp black & white images, so the text can't be selected or copied. Photos become noticeably softer. For the clearest result, keep it to one page. Your page size and layout never change.
Yes, whenever your file can get that small and stay readable. The tool never goes over 20 KB on purpose — it finds the best quality that still fits. If a file can't reach it, you get the smallest readable version and a clear message.
For files up to 20 pages, the pages are automatically saved as grayscale or sharp black & white images, which are much smaller. The text stays readable but can't be selected. If it still doesn't fit, keep only the pages you need with Split PDF and try again.
Very small limits like 20 KB are used by government, exam and scholarship portals so thousands of uploads stay fast and cheap to store. They're meant for a single scanned page, signature or certificate.
Yes. Click one of the size buttons or type any size from 10 KB to 100 MB and pick KB or MB. The size chart on this page also links to ready-made pages for every common limit.
You can upload PDFs up to 50 MB and 100 pages, and compress up to 10 files per day for free. The image method is used for files up to 20 pages. The daily limit resets every day. Need more? Toolszu Pro gives up to 200 a day and bigger files.
Yes. Open this page in Safari, Chrome or any mobile browser, choose your PDF and tap Compress PDF. The smaller file downloads straight to your phone — no app needed.
Yes. Your file is sent over an encrypted connection, converted in an isolated sandbox with no internet access, never shared with anyone and deleted automatically within 1 hour. You can also delete it right away with the Delete now button.
Yes, it's 100% free. There's no sign-up, no premium version and no watermark added to your PDF.
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Ready to Compress Your PDF to 20 KB?
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Compress PDF to 20 KB