Compress photos and documents to 512 KB for Taiwan ARC applications

ID photo and supporting document images: Not more than 512 KB, JPG for the ID photo; jpg, jpeg, png, bmp or pdf for documents format, as per the official requirements. Last checked October 2026.

Choose a requirement

NIA online applicationsNot more than 512 KB

Please choose the requirement of the website where you will upload the file. If it is not listed, choose “Custom” and enter the size in step 3.

NameFile size

Photographs for exam forms and identity documents must be cropped to size with the correct background. Please use the passport size photo maker.

Upload images

You can also drag images here.

You can choose up to 50 images at a time. Supported formats: JPG, PNG, WebP, HEIC, GIF, BMP, AVIF.

Set file size and dimensions

File size

For 1 MB, enter 1000. Leave a box blank for no limit.

Format
Dimensions

The original width and height are kept.

Check and download

After you upload images, check each requirement here and download.

Official requirements

The tool above has been set to these requirements.

What to upload
ID photo and supporting document images
File size
Not more than 512 KB
Dimensions
Not specified
Format
JPG for the ID photo; jpg, jpeg, png, bmp or pdf for documents
Other rules
  • ID photo: a JPG file larger than 4 KB and smaller than 512 KB, at least 531 × 413 pixels (height × width), not more than 300 dpi. Save it as a JPG; do not just change the file extension.
  • Supporting documents: colour images of 512 KB or less, upright and clear, named after the document type.
  • Crop the applicant's photo so that the face covers about two-thirds of the image.
Source
Last checked: October 2026

To crop the ID photo and change its background, use the ARC size in the passport photo maker. This page compresses document images and finished photos.

How to use

  1. The tool above has selected “NIA online applications” in step 1 and filled in the file size, format and dimensions in step 3.
  2. Upload your images in step 2. You can choose several at once, or drag them into the upload box.
  3. In step 4, check the result for file size, dimensions and format. If an item is invalid, change the settings in step 3 as explained below the image.
  4. Download the image. Several images are downloaded together as one ZIP file. Then upload the file to the website.

Common reasons for upload failure

  • File larger than 512 KB: some websites count 1 KB as 1000 bytes and others as 1024 bytes. This tool uses the stricter 1000 bytes, so the file is within the limit either way. If an image with many pixels is still too large at 50% quality, this tool reduces its dimensions in proportion. If you have unticked “Reduce dimensions if the file is too large”, please tick it again.
  • Wrong format: this website accepts only JPG for the ID photo; jpg, jpeg, png, bmp or pdf for documents. Please choose that format in step 3. HEIC photographs from an iPhone are converted to the chosen format.