SKSolveKit

Image & Data

Compress Image to 300 KB

Reduce images to under 300 KB for marketplace listings, school portals and document systems with a 300 KB cap.

Result in seconds Privacy first Free, no sign-up
Private

Drop your files here

Everything is processed on your device and every file comes out under 300 KB. Nothing is uploaded.

Loading the studio…

Share this tool

Referencing this tool on a website?

Copy an attribution link. It is optional and does not change free access.

Useful next stepCompress Images to 100 KB or Any Target SizeCompress whole batches of JPG, PNG, or WebP images to 50 KB, 100 KB, 200 KB, or any custom maximum size locally.

Transparent methodology

What the result includes—and what it does not

Updated SolveKit editorial review — browser image processing QA

Built for sellers and students preparing images for marketplace listings, school portals and document systems capped at 300 KB.

Calculation method

  1. 1Each JPG, PNG, or WebP image is decoded locally and redrawn to a fresh browser canvas; no file leaves the device.
  2. 2The compressor searches for the highest output quality under the 300 KB ceiling, reducing dimensions progressively only when needed.
  3. 3Batches of any size run in parallel Web Workers; results download individually or as one ZIP with per-file reports.

Assumptions and limits

  • 300 KB is a maximum per file; successful outputs always stay under it.
  • At 300 KB most product and document photos keep near-original perceived quality.
  • The exported file is re-encoded without the original EXIF metadata.

Worked example

A listing set for a marketplace capped at 300 KB

Input: Twelve item photos, target 300 KB, WebP output.

Output: Twelve files under 300 KB in one ZIP, each with original and final size listed.

Primary sources

How to use it

Three steps. One clear answer.

  1. 1Enter or paste the values requested by the tool.
  2. 2Review the input units and choose any relevant options.
  3. 3Calculate, then copy or download the result you need.

Built for trust

Useful without the friction.

  • No registration or paywall before your result.
  • Responsive controls for phone, tablet, and desktop.
  • Clear assumptions and warnings where estimates have limits.

Frequently asked questions

Will 300 KB compression hurt my listing photos?

At 300 KB the difference is usually invisible on a product page. The compressor keeps the highest quality that fits, so detail is only traded when the limit forces it.

JPG or WebP for a 300 KB limit?

WebP typically stores more detail at the same byte count. Choose JPEG only when the destination system rejects WebP.

Does the tool work on a whole folder?

Yes. Drop the folder's images together; every file is compressed to the 300 KB ceiling and the batch downloads as one ZIP.

Keep solving

Related image & data tools

View all

Compress Images to 100 KB or Any Target Size

Compress whole batches of JPG, PNG, or WebP images to 50 KB, 100 KB, 200 KB, or any custom maximum size locally.

Image & Data

Image Compressor

Compress JPEG, PNG, or WebP images locally with adjustable quality.

Image & Data

Image Resizer

Resize an image to exact dimensions while preserving aspect ratio.

Image & Data

QR Code Generator

Create downloadable QR codes for text, links, Wi-Fi, or contact data.

Image & Data

Remove Image Metadata

Remove EXIF, GPS, and other metadata from whole photo batches without re-encoding a single pixel.

Image & Data

HEIC to JPG Converter

Convert iPhone HEIC and HEIF photos to JPG — whole batches, decoded and converted on your device.

Image & Data