resizeimagein KB

Starting settings

Resize Image to 300KB Online Free

Choose your settings, inspect the preview and keep the original.

Starting settings — check your requirements

Drag & drop your images here

JPG · PNG · WebP · GIF · BMP

or paste an imageCtrl / ⌘ + V

Quick Target:
Supports JPG, JPEG, PNG, WEBP, GIF, BMP · Multiple files for batch compression100% Free (No Login)

What to check

File size
300 KB requested maximum
Dimensions
Original dimensions or your own setting
Format
JPG / PNG / WebP

Actual size and quality depend on your image. Settings do not certify acceptance by another service.

How to use this guidance

  1. 01

    Choose your original

    Select an image and keep a copy. Animated GIF input produces a still image.

  2. 02

    Set a maximum and dimensions

    Enter the destination’s requirements. Custom dimensions remain fixed even when a very small cap cannot be reached.

  3. 03

    Inspect the output

    Check actual bytes, pixels and readability. A preset does not guarantee third-party acceptance.

A 300 KB budget can be a useful starting point for a web photograph or image attachment when the destination allows it. It is not a universal website performance rule. Choose dimensions for the intended display, then compare detail and file size. A small thumbnail and a large banner have different needs even when both can fit below the same cap.

Compare JPG and WebP only if your publishing system accepts both. Look closely at hair, foliage, product edges and text in the picture. An image with more fine detail may need a different quality setting from a plain-background photo at the same pixel dimensions. Do not expect one reduction percentage across a whole image collection.

Setting a custom width and height prevents the size search from downscaling below them. If the result stays above 300 KB, decide whether a smaller frame is suitable or whether the destination permits a larger budget. Keep an original copy and inspect the downloaded result rather than repeatedly compressing the previous output.

For your own website, check the image in its actual page layout as well as in the tool's preview. Useful text should remain readable at the display size. For email or another upload service, confirm its total attachment and accepted-format rules separately; a per-image budget does not describe the total size of a message.

Common questions

Does a target guarantee an exact file size?

No. The target is a requested maximum. Inspect the actual bytes, dimensions and visual quality; a very small target can remain unmet.

Will compression keep every detail?

JPEG and WebP can lose detail. PNG uses lossless encoding, but resizing changes pixels. Keep your original and compare the preview.

Does this tool set print DPI metadata?

DPI converts centimeters or inches to pixels. This browser export does not write your chosen print-DPI tag. Check pixel dimensions and use print software for physical print settings.