Compress Image to 350 KB

Compress an image to 350 KB — sized for slide decks that have to survive a projector.

Upload Image

Supports JPEG, PNG, WebP, GIF, BMP and more — up to 50 MB

How to compress an image to 350 KB.

The target is preset, so this takes three steps — plus what to expect at 350 KB.

Step 1

Upload your image

Click upload or drag and drop any JPEG, PNG, WebP, SVG, or GIF file from your device.

Step 2

Target is already set to 350 KB

This page is preset to 350 KB, so there is nothing to type. Choose JPEG or WebP output for the most efficient result at this size.

Step 3

Compare, then download

Press compress and check the result against your original in the slider. Roughly 2600 × 2600 px is the realistic pixel budget at 350 KB — download when it looks right.

Getting the best results

Compress before inserting into the deck

Presentation software embeds whatever you give it and its built-in compression is blunt. Preparing images first keeps both quality and file size under your control.

Test on the actual projector if you can

Projectors wash out contrast and exaggerate banding. An image that looks fine on a laptop may show artefacts in the room, particularly in gradients and dark areas.

All image tools.

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Bulk Compressor

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Image Rotator

Rotate images by any angle or flip horizontally/vertically.

Compressing an image to 350 KB.

What 350 KB is actually for, what it can hold, and how to get there without wasting quality.

What 350 KB is good for

350 KB suits presentation imagery. A slide is projected large, often at unflattering brightness, and compression artefacts that hide on a laptop become obvious on a three-metre screen.

The other constraint is the deck itself. Twenty slides with unprocessed photographs produce a file too large to email; at 350 KB each the deck stays manageable.

Where this size is required

PowerPoint and Keynote slide imagery, conference presentations, projected photography, training materials, and PDF decks shared by email.

What to expect at 350 KB

Photographs stay clean to roughly 2600 × 2600 pixels, which projects cleanly at typical presentation resolutions without visible artefacts.

Frequently asked questions.

Everything you need to know about compressing images to 350 KB.

Embedded images at full camera resolution, almost always. Compressing each to a few hundred kilobytes before inserting typically reduces a deck by 90% with no visible difference when projected.

Most projectors are 1920 × 1080, so an image around 2000 pixels wide is sufficient. Higher resolution is downscaled at display time and only adds file size.

Embedded images at full camera resolution, almost always. Compressing each before inserting typically reduces a deck by 90% with no visible difference when projected.

Most projectors are 1920 × 1080, so around 2000 pixels wide is sufficient. Anything higher is downscaled at display time and only adds file size.

Yes. Projectors wash out contrast and exaggerate banding, so gradients and dark areas that look fine on a laptop can show visible steps on a large screen.

For a photographic JPEG, roughly 2600 × 2600 px is the practical ceiling before compression becomes visible. Flat graphics, screenshots, and document scans do considerably better, because they contain less fine detail to preserve.

No. Images are processed on our secure server only to perform the compression and are deleted immediately after your download. They are never stored, shared, or accessed by anyone.