Reduce an ID or document image without uploading it

If an upload form accepts an image of your ID or a scanned document, you can make a smaller copy in your browser before submitting it. PicThin does not upload your original or processed images. The copy still needs to meet the receiving service’s requirements for format, dimensions, and legibility.

This guide covers image files such as JPG and PNG. PicThin does not compress PDFs, combine document pages, retouch documents, or prepare compliant passport portraits. It cannot tell you whether a document will be accepted for a particular application.

A passport scan is different from a passport photo

A scan of a passport’s details page needs to preserve the document’s text and edges. A portrait submitted with an application can have separate rules for framing and background. Neither has a universal 200 KB limit. Read the instructions for the exact attachment on the official application website.

• Check whether it accepts images or requires PDF, and whether the size limit is per page, per file, or per submission.
• Look for requirements about complete edges, color, front and back, and minimum dimensions.
• Keep an original. If the receiving service prohibits a particular edit or compression method, follow its instructions.

Practice with a harmless file first

Download the public landscape sample to try selecting, processing, and saving an image. It is a workflow demo, not evidence that small document text will survive the same settings. For a closer look at what is sent over the network, follow the local-processing check.

Make a smaller document image

1. Open the size-limit compressor and enter the receiving service’s limit. Do not aim far below it just to get a tiny file.
2. Select an accepted format. JPG removes transparency. Use WebP only when the receiving service accepts it; for required PNG output, use the PNG tool and inspect the resulting size.
3. Choose an original image. PicThin adjusts quality and may reduce width and height. It does not enforce the portal’s minimum resolution.
4. Download the result and compare it with the original at 100% zoom in an image viewer. Check names, numbers, fine print, stamps, and edges. On a passport details page, also check the machine-readable characters along the bottom.
5. Verify the file type, size, and pixel dimensions before submitting that copy through the official portal. If important detail has become unclear, stop and return to the original.

Keep small text readable

Glare, blur, and a poorly framed scan should be fixed at the source. Compression cannot reconstruct missing characters. Repeatedly compressing the same copy will not improve them either.

If allowed, raise the target size and start again from the original. When the file size and minimum dimensions cannot both be met, consult the receiving service’s help. Do not remove or alter document information to reduce the file size.

Understand the privacy boundary

Processing locally avoids handing your image to a compression server. Sending the finished file to an application portal is still an upload. Loading site code, visit analytics, and voluntarily sending feedback are separate activities; see how PicThin works.

Compression does not redact visible information or guarantee metadata removal. Removing GPS data does not anonymize an ID with an address printed on it. For public sharing, decide what should be visible first; for an official submission, follow the recipient’s requirements.

If the portal still rejects it

Check for the wrong copy, an unsupported format, dimensions below the minimum, or a total attachment limit. Changing a PDF’s extension to .jpg will not make it an image. If the file matches the published requirements, ask the receiving service about the error. A successful compression is not approval of your application.