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Compress Image to 500 KB

Aim for a maximum of 500 KB for larger attachments and images for web pages. The size is preselected; reaching it depends on your image and the settings you allow.

PRIVATE BY DESIGN

Aim for 500 KB

No uploads to servers

Drop your images here

or select files from your device

JPG / JPEG, PNG, WEBP · Up to 20 images · 15 MB each · 60 MB per batch
Still images only. Maximum 8 megapixels and 8192px per side.

Your images are processed directly in your browser and are not uploaded to our servers.

Compression settings

The target is preselected. Start with the original dimensions; allow smaller dimensions if the byte limit matters more than image resolution. 1 KB = 1,000 bytes; 1 MB = 1,000 KB.

Formats are never changed silently. Unsupported browser encoders show an error.

A maximum size to attempt, not an exact-size guarantee.

Automatic uses 82% quality. Lower quality generally saves more bytes but can introduce artefacts. PNG ignores this setting.

Pixels. Images are never enlarged. Resizing changes image detail, including for PNG.

The search may lower JPG/WebP quality to this limit, capped by your selected quality.

Up to five additional size reductions. Leave off to preserve the selected dimensions.

0 / 20 images · 0.0 KB

Files stay in this tab until you clear them or leave. Re-encoded JPG/WebP and resized images may lose metadata and change colour rendering. Lossless PNG keeps colour and orientation chunks; original fallbacks retain their metadata. Always check the downloaded image before sharing it.

How to use Compress Image to 500 KB

  1. Select or drop JPG, PNG or WebP images into the tool. File content is checked before processing.
  2. Check the preselected 500 KB target, quality floor and resizing permission.
  3. Press Compress images. Each file is processed in a background worker.
  4. Review the actual sizes, dimensions and comparison previews. Open the download to inspect full detail.
  5. Download each result or prepare a ZIP of completed images. Keep your originals until you are satisfied.

Work within a 500 KB file-size limit

At 500 KB, moderately sized photographs may fit without substantial dimension changes. Use the original format initially, compare the download at its intended display size, and avoid shrinking a diagram so far that labels become hard to read.

Control the trade-off between detail and bytes

The minimum quality starts at 35%. The algorithm returns a result at or below the limit when possible rather than adding padding to make a file exactly 500 KB.

How the target search works

The tool measures encoded bytes after each attempt. It searches JPG/WebP quality within your selected range, then tries smaller dimensions only if allowed. PNG remains lossless at each chosen resolution and does not use the quality slider. The search is bounded; if it cannot meet the limit, it returns the smallest tested result with an honest warning.

Frequently Asked Questions

Can every image reach 500 KB?

No. Resolution, image detail, format and permitted quality all affect the final size. A target miss is clearly labelled; try allowing smaller dimensions or choose another supported output format.

Does 500 KB mean an exact size?

No. The goal is at or below the stated byte limit. Files are never padded to match an exact size. The result shows the actual output size.

Will the tool change my format or dimensions automatically?

The original format is preserved unless you select another format. Target-driven resizing is off by default and requires your permission. Explicit resize-to-fit settings also preserve the aspect ratio.