Make your image fit the requirement.

What is IMAGE SIZE PRO?

Most image tools ask "how much smaller do you want this?" and give you a slider. IMAGE SIZE PRO asks a different question: what does this image actually need to satisfy? If a form says "under 100KB," or an application wants a photo at exactly 300×400 pixels, dragging a quality slider and hoping is slow and unreliable. You upload, get rejected, and try again. This tool works from your stated requirement backwards: type the number, and it finds the settings that meet it, then shows you proof.

Compress images to the size you need

Turn on "Limit file size" in the tool above, type a target or tap a common preset (20KB, 50KB, 100KB, or 200KB), and the tool searches for the highest JPG or WebP quality that still lands at or under it. If your original is a large photo and the target is strict, it also scales dimensions down as needed, and tells you plainly when it had to.

Resize images to exact dimensions

Pixel dimensions (width × height) are different from file size, and plenty of forms care about both. Turn on "Resize" to set an exact width and height: lock the aspect ratio and enter just one value to have the other calculated automatically, or set both and choose whether to crop to fill the box, fit the whole photo inside it, or stretch to match exactly. Ask for 800×600 and that's what you get, never a "maintain aspect ratio" substitution that quietly changes your numbers.

Compress + resize in one workflow

A lot of real requirements are both at once. "300×400 pixels and under 50KB" is a completely normal ask for an application photo, and hitting it usually means doing compression and resizing together, not as two separate steps on two separate sites. Set both in the tool above and they're applied and checked in a single pass, so you're not left wondering whether resizing afterward undid the size limit you hit first.

Check whether your image meets the requirement

Every result comes back with a plain verification, not just a download link: Format ✓, File size ✓, and Dimensions ✓ are shown for whichever requirements you actually set, followed by a single Requirement satisfied ✓ line when everything checks out — or a plain explanation of what didn't fit, if something couldn't be met. You know before you submit a file, not after it's rejected.

Supported image formats

JPG/JPEG, PNG, and WebP are supported for both input and output. JPG and WebP are lossy formats with a quality dial, so they're the better choice when you need to hit a strict file-size target. PNG is lossless: every pixel is preserved exactly, which is right for screenshots, logos, and anything needing transparency, but it has no quality dial and shrinks mainly through resizing rather than compression.

Privacy and browser processing

The tool decodes, resizes, compresses, and converts your file using image-processing APIs built into your own browser (Chrome, Firefox, Safari, Edge). Your image is never sent to a server as part of using this tool: there's no upload step to intercept, and no server-side copy to retain or delete later, because one is never made. You can confirm this yourself by watching your browser's network activity while you use the tool. See how it works for the full technical explanation.

Common image size requirements

A few size and dimension targets come up often enough to be worth naming directly. Treat these as common, typical figures, not universal rules, since exact requirements always depend on the specific form or platform you're using:

• Image below 100KB — a frequent cap on application and registration forms.
• Image below 50KB — common on exam and registration portals.
• 200 × 200 pixels — a typical square size for avatars and profile photos.
• 300 × 400 pixels — a common portrait size for application-style photo uploads.

We don't state these as official specifications for any particular government body, exam, university, or company. Always check the exact number on the form you're actually submitting to.