Private, exact-size compression
Compress image to 1MB
Bring oversized images under 1MB without uploading them or giving up more quality than the limit requires.
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
High quality with a predictable ceiling
A 1MB target is generous enough for detailed screen images while still avoiding oversized uploads and slow transfers.
Use Advanced settings to cap very large camera images at a practical display width before compression.
Where this target helps
High-resolution profile and portfolio images
Website assets that need a firm size ceiling
Email attachments and shared photo collections
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 1MB.
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
Is 1MB treated as 1000KB or 1024KB?
This tool uses 1024KB for the 1MB preset and reports the exact byte size of every result.
Why is the result much smaller than 1MB?
The target is a maximum, not a request to inflate the file. The compressor never adds waste just to approach the limit.
Can I download a full batch together?
Yes. After processing, Download all creates a ZIP file locally in your browser.
Private by design
Your images stay yours.
The compressor has no image upload API. Analytics never receives file names or image contents.