Compress Image to 900 KB

Compress an image to 900 KB — just under a megabyte, where many upload forms draw their line.

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

How to compress an image to 900 KB.

The target is preset, so this takes three steps — plus what to expect at 900 KB.

1
Step 1

Upload your image

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

2
Step 2

Target is already set to 900 KB

This page is preset to 900 KB, so there is nothing to type. Choose JPEG or WebP output for the most efficient result at this size.

3
Step 3

Compare, then download

Press compress and check the result against your original in the slider. Roughly 4100 × 4100 px is the realistic pixel budget at 900 KB — download when it looks right.

Getting the best results

Aim under, never at, a stated cap

Where 1 MB could mean either 1,000,000 or 1,048,576 bytes, a 900 KB file satisfies both. The safety costs nothing you can see.

Check the total, not just each file

Forms often cap individual files and the whole submission separately. Three 900 KB attachments may pass individually and still exceed a 2 MB combined limit.

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Compressing an image to 900 KB.

What 900 KB is actually for, what it can hold, and how to get there without wasting quality.

What 900 KB is good for

900 KB is a margin size below 1 MB. A great many upload forms, ticketing systems, and content platforms cap files at exactly one megabyte, and 900 KB clears that under any interpretation.

The gap matters more here than at smaller sizes, because the ambiguity is larger: 1 MB might mean 1,000,000 or 1,048,576 bytes.

Where this size is required

Uploads capped at 1 MB, support ticket attachments, job application portals, learning management systems, and forum attachment limits.

What to expect at 900 KB

Roughly 17 megapixels of data, which prints at A4 and is far beyond what any on-screen review requires.

Frequently asked questions.

Everything you need to know about compressing images to 900 KB.

Both definitions are in use, which is the problem. Operating systems increasingly use 1,000 while some software still uses 1,024, so targeting 900 KB removes the guesswork.

Often a separate total-submission limit, or the encoding overhead that some systems add on receipt. Compressing to 900 KB or lower usually resolves both.

Both definitions are in use, which is the problem. Targeting 900 KB satisfies either reading of a 1 MB cap without you having to find out which one applies.

Often a separate total-submission limit, or encoding overhead added on receipt. Compressing to 900 KB or below usually resolves both causes.

Frequently both, and they rarely say so clearly. Three 900 KB attachments can pass individually and still breach a 2 MB combined limit.

For a photographic JPEG, roughly 4100 × 4100 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.