Private, exact-size compression
Compress image to 500KB
Shrink large photos to a 500KB ceiling while preserving useful resolution and detail.
Exact-size image compressor
Browser-only processing · six output formats
Your images never go to an upload server. Decoding, compression, previews, and ZIP creation happen on this device.
Advanced settingsDimensions, crop, quality
Dimensions never upscale. JPEG and BMP replace transparency with white. GIF output is static; animated GIF and WebP inputs use the first decoded frame.
A real before-and-after example
See what the size limit changes
This example starts as a detailed 3.30MB PNG and is processed by the same browser workflow used above. Fine texture is retained while the output stays under the selected 100KB ceiling.
- 01
Decode locallyNo image is sent to a server.
- 02
Search quality firstThe engine keeps the highest result that fits.
- 03
Resize only if neededDimensions change only when quality alone is not enough.
Ready-made limits
Pick the size your form asks for
Each landing page opens the same compressor with the target already selected. A custom KB value is always available.
Why this limit matters
A strong web and sharing budget
Five hundred kilobytes can retain high visual quality for many screen uses. The compressor still measures the real file size instead of relying on a rough quality preset.
For web publishing, WebP often provides a smaller result than JPEG at a similar visual quality.
Where this target helps
High-quality web images and content uploads
Product photos and portfolio samples
Smaller attachments for email and messaging
Format support
Seven inputs. Six honest outputs.
The output picker includes JPEG, PNG, WebP, AVIF, GIF, and BMP. HEIC and HEIF remain input-only because mainstream browsers do not provide a reliable local HEIC export encoder.
| Format | Input | Output | Best use |
|---|---|---|---|
| JPEG | Yes | Yes | Best default for photographs and broad form compatibility. |
| PNG | Yes | Yes | Lossless output with full transparency. |
| WebP | Yes | Yes | Compact modern output with transparency. |
| AVIF | Yes | Yes | High-efficiency browser output powered by a local codec. |
| GIF | Yes | Yes | Static output; animated input uses the first decoded frame. |
| BMP | Yes | Yes | Uncompressed legacy output; dimensions may shrink to hit a limit. |
| HEIC / HEIF | Yes | Input only | Decoded locally, then exported to one of the six reliable formats. |
Compression method
Highest useful quality, without guessing
Search quality first
JPEG, WebP, AVIF, and GIF outputs search for the highest setting that stays below 500KB.
Resize only when required
If encoding alone cannot reach the limit, the engine reduces dimensions and searches again. It never upscales.
Report the measured result
Every file shows its actual bytes, dimensions, savings, and whether the maximum was reached.
FAQ
Questions before you compress
Can a multi-megabyte photo stay full size at 500KB?
Often yes, but it depends on resolution and visual complexity. Detailed or noisy images may need a modest dimension reduction.
Can I set a smaller custom value from this page?
Yes. Select Custom and enter any target between 5KB and 10MB.
Is there a watermark or daily limit?
No. The tool adds no watermark and does not require an account or usage quota.
Private by design
Your images stay yours.
The compressor has no image upload API. Analytics never receives file names or image contents.