Scanned Document Too Large for Portal Upload?
Convert TIFF, BMP & High-Res PNG Scans to Portal-Ready JPG in Seconds
Government portals, banks, universities, and visa offices reject oversized scans every day. Your office scanner creates 25-50MB TIFF files, but the portal wants a 500KB JPG. Diwadi converts and compresses scanned documents offline -- your identity documents, transcripts, and financial records never leave your computer.
Portal Upload Requirements at a Glance
| Portal Type | Max File Size | Accepted Formats | Notes |
|---|---|---|---|
| Visa Portals (CEAC, VFS Global) | 200-500 KB per document | JPG only | Very strict -- most scanner defaults exceed this by 50-100x |
| Banking KYC | 2-5 MB | JPG, PNG | Moderate limits, but raw scans still too large |
| University Applications | 1-5 MB per document | PDF, JPG | Transcripts, certificates, recommendation letters |
| Government Job Applications | 100 KB - 500 KB | JPG only | Most restrictive -- requires heavy compression |
| Court e-Filing | Varies, typically < 10 MB per exhibit | PDF, JPG | Multiple exhibits can add up quickly |
| Tax Filing (IRS / HMRC) | 5-15 MB | PDF, JPG | More generous, but multi-page scans still exceed limits |
Why Scanners Create Huge Files
Most office and home scanners default to settings that produce massive files far exceeding what portals accept.
600 DPI TIFF (scanner default)
Uncompressed, lossless -- meant for archival, not uploading
300 DPI PNG
Lossless compression, still 5-30x larger than portal limits
300 DPI BMP
Uncompressed bitmap -- legacy Windows default
Portals typically want: 200 KB - 2 MB JPG
That is a 10x to 100x size gap between what your scanner produces and what the portal accepts.
Format Conversion Guide
TIFF to JPG
TIFF (.tif, .tiff)
Scanner default format. Lossless but massive -- a single A4 page is 25-50 MB at 600 DPI.
When: Convert for any portal upload. No portal accepts TIFF.
50 MB TIFF becomes a 200-500 KB JPG
BMP to JPG
BMP (.bmp)
Uncompressed Windows bitmap format. Legacy scanners and older Windows software default to BMP. Files are 25-35 MB per page.
When: Convert any BMP scan before uploading. No modern portal accepts BMP.
30 MB BMP becomes a 200-400 KB JPG
PNG to JPG
PNG (.png)
Lossless format from screenshots or modern scanner apps. Often 3-10x larger than needed for portal uploads.
When: Convert when PNG exceeds the portal's file size limit or when JPG is the only accepted format.
8 MB PNG becomes a 300-600 KB JPG
High-Res JPG to Compressed JPG
JPG (.jpg, .jpeg)
Phone cameras and high-DPI scanners produce JPG files at 5-15 MB. The format is correct, but the file is too large.
When: When the portal already accepts JPG but your file exceeds the size limit.
12 MB JPG becomes a 300-800 KB JPG
Optimal Scan Settings for Portal Uploads
If you can adjust your scanner settings before scanning, use these to avoid conversion altogether.
Text documents (letters, forms, applications)
Large forms (A3, legal size)
Photos and IDs
Already scanned at high DPI? No need to re-scan. Diwadi converts and compresses existing scans to portal-ready sizes.
Real-World Scenarios
University Transcript Upload
Problem: Your registrar scanned your transcript as a 600 DPI TIFF (42 MB). The Common App portal accepts max 5 MB JPG.
Solution: Convert TIFF to JPG and compress to under 5 MB. Text stays crisp and readable at 300 DPI JPG.
Portals: Common App, UCAS, WES
Passport Scan for Visa Application
Problem: You scanned your passport bio page as a high-res PNG (9 MB). The CEAC DS-160 portal requires under 240 KB JPG.
Solution: Convert PNG to JPG and compress to under 240 KB. Diwadi processes your passport scan offline -- it never leaves your device.
Portals: CEAC, VFS Global, TLS Contact
Bank Statement for KYC Verification
Problem: Your bank emailed statements as scanned TIFF images at 15 MB each. The fintech app needs each page under 2 MB JPG or PNG.
Solution: Batch convert all TIFF pages to compressed JPG. Financial data stays on your computer -- no cloud uploads.
Portals: Revolut, Wise, broker onboarding
Property Documents for Legal Filing
Problem: Scanned property deeds and title documents total 180 MB in TIFF format. The court e-filing system has a 10 MB per exhibit limit.
Solution: Convert each TIFF to JPG and compress to under 10 MB. Legal documents processed entirely offline for confidentiality.
Portals: Court e-filing systems, notary portals
Certificate Scan for Government Job Application
Problem: Your degree certificate was scanned as a BMP (28 MB). The government recruitment portal accepts only JPG under 300 KB.
Solution: Convert BMP to JPG at 80% quality and compress to under 300 KB. Degree details remain legible even at high compression.
Portals: UPSC, SSC, state PSC portals
Need to Extract Text from Scans Too?
If you need to extract text from your scanned documents (not just convert the image format), Diwadi includes an OCR (Optical Character Recognition) tool that reads text from images -- all processed offline on your device.
Try Extract Text (OCR) ToolHow to Prepare Scanned Documents with Diwadi
Download and Open Diwadi
Install Diwadi on your Mac or Windows computer. No account required, no internet needed for conversion or compression.
Drop Your Scanned Documents
Drag and drop your TIFF, BMP, PNG, or oversized JPG scans into Diwadi. Process multiple documents at once with batch conversion.
Choose Output Format and Size
Select JPG as the output format and set your target file size (e.g. under 500 KB). Diwadi converts the format and compresses in one step.
Upload to Your Portal
Your portal-ready files are saved locally. Upload them to your visa, bank, university, or government portal. Sensitive documents never leave your device.
Why Convert Sensitive Scans Offline?
Identity Documents
Passport scans, ID cards, and driver's licenses contain personal identification numbers and biometric data. Converting these through online tools means uploading your identity to third-party servers.
Financial Statements
Bank statements, tax documents, and financial records contain account numbers, transaction history, and income details. Diwadi processes these entirely on your computer.
Legal Documents
Property deeds, court filings, contracts, and notarized documents contain privileged or confidential information. Offline processing ensures attorney-client privilege is not compromised.
Certificates and Academic Records
Degree certificates, transcripts, and professional certifications contain personal details that could be used for forgery if intercepted. Keep them local.
Personal Records
Medical records, insurance documents, and employment records all contain sensitive personal data protected by regulations like GDPR, HIPAA, and CCPA.
Common Mistakes When Preparing Scans for Upload
Uploading sensitive scans to online converters
Free online TIFF-to-JPG tools upload your document to their servers for processing. For passport scans, bank statements, and legal documents, use a desktop tool that processes files locally.
Not checking the portal's format requirements first
Different portals have very different requirements. A visa portal may need under 240 KB JPG while a university portal accepts 5 MB PDF. Always check before converting.
Over-compressing until text is unreadable
Aggressive compression can blur fine print, dates, and numbers on scanned documents. Always preview the compressed file. If text is not clearly legible, increase quality or file size target.
Re-scanning instead of converting existing scans
Many people re-scan documents at lower settings when the existing high-quality scan can be converted and compressed in seconds. No need to find the original document and scan again.
Sending the wrong DPI for the document type
150 DPI is fine for large forms, but ID documents and certificates with fine print need 300 DPI to remain legible. Match DPI to the document content, not just the file size target.
Document Scan Upload Checklist
- Check the portal's maximum file size per document
- Check the portal's accepted file formats (JPG, PNG, PDF)
- Verify the number of documents you need to upload
- Convert TIFF/BMP/PNG scans to JPG (or the required format)
- Compress to under the portal's file size limit
- Preview each converted document -- all text must be legible
- Ensure document edges and corners are fully visible
- Keep original high-resolution scans as backup
Frequently Asked Questions
Why is my scanned document so large?
Most scanners default to 600 DPI TIFF or high-resolution PNG -- formats designed for archival and printing, not portal uploads. A single A4 page scanned at 600 DPI TIFF can be 25-50 MB, while portals typically accept 200 KB to 5 MB.
Can I convert TIFF to JPG without losing readability?
Yes. JPG at 80-85% quality preserves text readability for all practical purposes. A 50 MB TIFF converts to a 200-500 KB JPG that looks identical on screen. The visual difference is imperceptible for scanned documents.
Is it safe to use online tools to convert passport scans?
Online converters upload your documents to external servers for processing. For sensitive documents like passport scans, ID cards, and financial records, use a desktop tool like Diwadi that processes files entirely on your computer -- nothing is uploaded anywhere.
What format should I convert scanned documents to?
JPG is the safest choice -- it is accepted by virtually every portal and produces the smallest file sizes. Only use PNG if the portal specifically requires it, or PDF if multiple pages need to be combined into one file.
How small can I compress a scanned document?
A typical A4 text document can be compressed to 100-300 KB JPG while remaining fully legible. Documents with photos or fine detail (like passport pages) should stay at 200-500 KB to preserve clarity. Preview before uploading to verify.
Can I batch convert multiple scanned pages at once?
Yes. Diwadi supports batch conversion -- drop all your TIFF, BMP, or PNG files at once and convert them all to compressed JPG in one step. No per-file limits or daily caps.
My portal requires PDF but I have TIFF scans. What do I do?
First convert your TIFF scans to JPG to reduce file size, then combine the JPGs into a single PDF if needed. Diwadi handles both format conversion and compression.
What DPI should I use for scanned documents?
300 DPI is ideal for text documents -- sharp enough to read all text clearly while keeping file sizes manageable. Use 150 DPI only for large forms where fine print is not critical. 600 DPI is unnecessary for portal uploads.
The portal rejected my file even after conversion. Why?
Common reasons: file is still too large (check the exact KB limit), wrong format (some portals accept only JPG, not PNG), file name contains special characters, or the portal has dimension requirements (width/height in pixels) in addition to file size limits.
Do I need to re-scan my documents at lower quality?
No. If you already have high-quality scans, Diwadi can convert and compress them to portal-ready sizes in seconds. Re-scanning is unnecessary -- converting existing scans is faster, easier, and preserves the original quality for your records.
Get Your Scanned Documents Portal-Ready in Seconds
Diwadi converts and compresses TIFF, BMP, and PNG scans to portal-ready JPG -- entirely offline. Your sensitive documents never leave your computer.