Whether opening a new bank account, applying for a home loan, investing in mutual funds, or updating your demat account, you must complete the KYC (Know Your Customer) process. Today, most Indian financial institutions permit digital KYC document uploads. However, strict file size ceilings often cause uploads to fail. This guide details standard bank limits and shows how to securely compress your identity documents locally.
What Documents Are Required for Bank KYC?
Banks require officially valid documents (OVD) to verify both your identity and residential address. The standard list includes:
- Proof of Identity: Aadhaar Card, PAN Card, Passport, or Voter ID Card.
- Proof of Address: Aadhaar Card, Passport, Voter ID Card, Driving License, Utility Bills (Electricity/Water, under 3 months old), or recent Bank Statements.
- Photograph: A recent passport-size color photograph with a light background.
- Financial Proof: Scanned cancelled cheques or bank statements (often requested for loan or demat applications).
Bank KYC Document Size Limits
Each Indian bank sets its own document portal upload limits to keep server storage requirements manageable. The standard limits for major banks include:
- SBI (State Bank of India): Maximum 500KB per document.
- HDFC Bank: Maximum 2MB per document (PDF format preferred).
- ICICI Bank: Maximum 1MB per document.
- Kotak Mahindra Bank: Maximum 500KB per document.
- Most Portals (Default standard): Keeping your document sizes under 500KB guarantees compatibility across almost all portals.
Is It Safe to Compress KYC Documents Online?
Standard online compression tools require uploading your sensitive files to cloud servers. Because Aadhaar cards and PAN cards contain highly sensitive personal details, uploading them to unverified servers presents a critical identity theft risk.
ResizeKB resolves this security gap. Our tools process files entirely within your web browser sandbox using Javascript. No file is ever uploaded to our servers, and your private KYC data remains safely on your computer or mobile device.
How to Compress Aadhaar PDF for Bank KYC
Most Indian residents download their official e-Aadhaar from the UIDAI website in PDF format. However, UIDAI PDFs are usually encrypted and relatively heavy (often 1MB to 2MB). To compress your Aadhaar PDF to bank-accepted limits:
- Go to our secure Aadhaar PDF Compress tool.
- Upload your e-Aadhaar PDF file.
- When prompted, enter your e-Aadhaar password (the standard format is the first 4 letters of your name in CAPS, followed by your birth year). Our tool processes the password locally to decrypt and compress the document below 200KB.
How to Merge Aadhaar Front and Back for KYC
When applying for accounts online, portals often provide only a single upload slot for your Aadhaar card. This means you must merge the front (with your photo and details) and the back (with your address) into a single page:
- Go to our Merge Aadhaar Front and Back tool.
- Select the front side photo and back side photo of your Aadhaar card.
- Select your preferred layout (vertical is recommended). Click "Merge". The tool combines both photos onto a single canvas and exports a compact JPEG or PDF file under 500KB.
Frequently Asked Questions
The standard limit is under 500KB per file. While some banks accept up to 1MB or 2MB, staying below 500KB ensures your upload is accepted on any Indian banking portal.
It is only safe if you use a client-side tool like ResizeKB. Avoid uploading images of your Aadhaar or PAN card to tools that process documents on remote cloud servers.
Upload a clear photo of your PAN card to our Bank KYC Document Compressor. The tool resizes the canvas and exports a optimized JPEG under 500KB while keeping text details clear.
PDF, JPEG, JPG, and PNG are the standard formats accepted by financial portals. PDFs are highly recommended for multi-page documents like bank statements.
Use our KYC Document Compressor. It parses the PDF file locally, optimizes font data, scales down high-resolution embedded images, and recompresses it below 500KB without losing text readability.
Related tools: Bank KYC Document Compressor | Aadhaar PDF Compress | Merge Aadhaar Front & Back