Compress PDF to 400 KB for DS-160
Get your supporting documents under the size limits used for US visa DS-160 and related online uploads.
Files are optimized losslessly when possible. To guarantee an exact size, larger files are converted to images, which can soften text and remove the selectable text layer.
Compressing PDFs for US visa DS-160 supporting documents
The DS-160 form itself is mostly data entry, but the US visa process and the scheduling systems around it often ask you to upload supporting documents, and those uploads come with size limits. A few hundred kilobytes per file is typical, and 400 KB is a safe target for a clear scan, though the exact limit depends on the system you are using, so check the instructions on the official site before uploading.
Visa paperwork includes financial statements and personal identity documents. KiloPDF compresses everything in your browser, so these sensitive scans stay on your own device.
Drop in your document, keep the 400 KB target, and download the result. Files that are already under the limit are returned without any re-encoding.
Need the general tool? Compress PDF to 400 KB for any purpose.
How it works
- Step 1
Drop in your PDF. It stays on your device.
- Step 2
Pick a target size (or type a custom KB value).
- Step 3
Download a PDF compressed to your target in seconds.
Why compress a PDF to 400 KB?
- Financial and employment documents for a US visa
- Invitation letters and itinerary scans
- Supporting documents requested for your interview
Compress to another size
Frequently asked questions
Is 400 KB the right size for US visa DS-160 supporting documents?
400 KB is a commonly requested target, but limits vary and change over time. Check the exact requirement on the relevant portal or provider before you upload or send.
Are my files uploaded to a server?
No. Compression runs entirely in your browser using WebAssembly. Your PDF never leaves your device, which makes this safe for KYC, banking, and government documents.
How do you hit exactly 400 KB?
We re-encode each page as an image and search across quality and resolution settings until the rebuilt PDF lands at or just under 400 KB, keeping the best quality that still fits.
Is it really free with no watermark?
Yes. No sign-in, no per-hour task caps, no watermark, and no file-count limits, unlike most incumbents.
Will the text stay selectable?
When the file already fits or can be optimized losslessly, text stays sharp and selectable. To guarantee a smaller exact size we rasterize the pages, which is exactly what portal uploads need. If you need selectable text, keep your original.