How to Reduce a Photo to Under 100 KB

A lot of forms, email limits, and application portals reject a photo once it passes 100 KB (kilobytes). A phone picture is often several megabytes, so the fix is not a mystery setting. It is a smaller pixel size plus a compressed file format. Quialo's image compressor does both in your browser. The photo is never uploaded.

Set a target size

Drop the photo onto the compressor and choose Target size, then Under 100 KB. The tool tries the highest JPEG (Joint Photographic Experts Group) or WebP quality that still lands under that size, and the row tells you which quality it used.

If quality alone cannot get there, it reduces the width and height and keeps the aspect ratio. A 4000 by 3000 photo does not need to stay that large for a form thumbnail. Most of the savings on a phone picture come from fewer pixels, not from crushing the quality slider.

You can also type a custom size, or pick under 200 KB, 500 KB, or 1 MB (megabyte), when the limit is different.

Resize while you compress

Leave max width or max height blank and the tool only shrinks when the target requires it. If you already know the photo will be shown at 1200 pixels wide, type 1200 as the max width. The height follows the original proportions, and a picture that is already smaller is left alone.

The same limits apply to a whole batch. Drop up to 50 images, set one max width, and every file is fitted the same way.

Download one file or a zip

Each row shows the original size, the new size, and the percent saved. Download a single image, or download every successful file as one zip. If one image in the batch fails, it is left out of the zip and a short note inside the zip names it.

PNG (Portable Network Graphics) is lossless, so a quality slider cannot shrink it. A new PNG can even be larger than the file you started with. For a photo, convert to JPEG or WebP. For a screenshot, WebP usually gets much smaller and keeps the text readable.

What the new file leaves out

The compressor draws the picture again on a canvas and saves that drawing. Camera details and the place the photo was taken are stored as EXIF (Exchangeable Image File Format) data, and they are not copied into the new file. That is the default, and it cannot be turned off. Your original file on disk is not changed.

Nothing you drop is sent to a server. The same idea is explained in Why browser-based tools protect your data. For a wider look at format and quality, see How to compress an image without losing quality.

If you need a different edit, these tools run the same way:

• Image Resizer sets an exact width and height.
• Image Format Converter switches among PNG, JPEG, WebP, and AVIF (AV1 Image File Format).
• Images to PDF puts pictures into one PDF (Portable Document Format).