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Image Compressor to Exact KB

The all-in-one image compliance tool. Set an exact file size, exact dimensions and a format — then get a pass/fail check that proves your image is ready to upload.

No upload Free forever No signup

Drag & drop images, or browse

JPG · PNG · WebP · HEIC · HEIF — processed privately in your browser

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Format
Quick targets:

Your compressed images appear here. Nothing is uploaded — everything runs on your device.

Why exact size matters

Built for upload forms that reject your photo

Exam portals, visa applications, job sites and government forms enforce strict KB limits and pixel sizes. FitToKB hits them precisely so your upload is accepted the first time.

Jump to a target size

20 KB 50 KB 100 KB 150 KB 200 KB 300 KB 500 KB

By format

Compress JPG Compress PNG HEIC to JPG PNG to JPG

How to compress to an exact KB

Three quick steps

  1. 1

    Upload your image

    Drop a JPG, PNG, WebP, HEIC or HEIF file into the box, or click to browse. Processing is local — nothing is uploaded.

  2. 2

    Enter your exact target

    Type the target size in KB or MB. Add exact width and height and a format if your form requires them.

  3. 3

    Check & download

    FitToKB compresses to your target without exceeding it, shows a ✅/❌ compliance check, and lets you download the file or a ZIP for batches.

Frequently asked questions

How do I compress an image to an exact size like 50 KB?
Upload your image, type 50 in the target field with KB selected, and FitToKB automatically finds the highest quality that stays at or below 50 KB. The result panel confirms the final size.
Will the file ever go over my target size?
No. The engine only accepts a result that is at or below your target. If the target is very small for the chosen dimensions, FitToKB reduces quality and, where allowed, resolution, and tells you if it could not reach the target so nothing is a surprise.
Can I keep exact dimensions while hitting a size limit?
Yes. Enter the width and height you need. FitToKB keeps those dimensions fixed and adjusts quality to meet the size target, then validates both.
Does compressing reduce image quality?
Lossy formats (JPG, WebP) trade some quality for size. FitToKB always uses the highest quality that fits your target, so the loss is the minimum required. For graphics with text or transparency, PNG or WebP usually look better.
Is there a file size or batch limit?
No artificial limits. You can process many images at once and download them together as a ZIP. The only constraint is your device’s memory.

Related tools

More free, private image tools from FitToKB.

PNG Compressor

Shrink PNG files in your browser, or convert to a smaller format.

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JPG Compressor

Reduce JPG/JPEG photos to an exact KB target without visible loss.

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HEIC to JPG

Convert iPhone HEIC/HEIF photos to JPG — and resize to a size limit.

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PNG to JPG

Convert PNG to JPG with a white background and optional size cap.

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JPG to WebP

Modern WebP output for the smallest files at the same quality.

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Passport Photo Maker

Generate a compliant passport or visa photo for any country.

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Compress your first image now

Free forever. No signup, no watermark, no upload. Everything runs on your device.

Open the compressor