What does Compress Image do?
Compress Image is a free online tool that can reduce image file size by adjusting quality. The JPG result from Compress Image is a separate copy to inspect before you use it elsewhere. One possible use is photos prepared for email attachments.
Image size reduction changes the sent image into a JPEG at the quality setting you choose. This is useful when a photo needs a smaller delivery copy, but the output format matters as much as the quality value.
A see-through PNG or WebP will no longer be a see-through image in the JPEG result. Keep a high-quality original and compare the download at its planned display size rather than judging only the number of bytes.
The quality field changes JPEG output quality. A lower number can save bytes while adding visible marks near edges.
Test a smooth background and a fine line in the same picture. The output size still depends on the source. Keep an untouched copy if you will need another quality level later.
Reduce photo size with JPEG quality online: steps
Before using Compress Image, decide what the new copy must contain and where it will be used. Choose a quality setting right for the subject, keeping the original for future editing. Review the upload area and all values required by the current Compress Image form.
Choose the source
Read small text in a compressed screenshot. For Compress Image, choose one source from your device. Keep a source copy for another attempt.
Review the form values
Quality (1-100) controls a value used by Compress Image. The starting Quality (1-100) value is 80.
Run the file task
Use Process Compress Image after checking the source and form values. Wait for the job to finish. An error means this attempt failed.
Save and check the output
Check faces, fine textures, gradients and sharp text edges, then compare file size with the source. Store the output on your device. Name this copy separately from the original.
Reduce size: uses for Compress Image
Compress Image can help with large camera images tested for a web workflow. It can also be used for preview copies made for a project review. The JPG result from Compress Image must suit the intended reading or editing step, so keep the source until that check is complete.
- Photos prepared for email attachments.
- Large camera images tested for a web workflow.
- Preview copies made for a project review.
- Non-see-through picture assets reduced for delivery.
Formats and limits for Compress Image
The Compress Image form accepts the image formats in the table sources. Each Compress Image upload can be up to 300 MB, which equals 300 MiB. The allowed suffixes on the Compress Image page do not prove that a source has valid content inside it.
| Accepted formats | Maximum file size | Output |
|---|---|---|
| JPG, JPEG, PNG, WEBP, TIF, TIFF | 300 MB per file (300 MiB upload limit) | JPG |
The output is JPG and may not be smaller for every input. Lossy size reduction and loss of clear areas can make this unsuitable for logos or diagrams.
How this tool works
Compress Image uses ImageMagick to handle the source on the server. The Compress Image request uses your chosen input rather than any local editing project left on your device. Check the JPG contents produced by Compress Image before treating them as ready for another app or reader.
For Compress Image, your browser uploads the source to our file-processing server. This is a server task, not local editing.
Files are due for deletion within 1 hour. Cleanup runs during normal service operation. Keep a local download for future use.
Compress Image questions and answers
If Compress Image gives an unexpected result, start by checking the source type and the values used in the form. Check the JPG contents from Compress Image as well as the filename or displayed message. For another result type, compare Compress Image with the separate tools described in these answers.
What matters when using Compress Image?
Inspect a smooth sky for bands or block-like marks. View that area at its intended display size. Note any differences that affect your purpose.
Why try Resize Image?
Resize Image offers another task beside Compress Image: fit an image within width and height bounds while preserving proportions. Resize Image returns PNG. The stated JPG output from Compress Image matches a listed input type for Resize Image.
Why try Convert to WebP?
Convert to WebP offers another task beside Compress Image: convert images to WebP format. Convert to WebP returns WEBP. The stated JPG output from Compress Image matches a listed input type for Convert to WebP.
Why try Convert to AVIF?
Convert to AVIF offers another task beside Compress Image: convert images to AVIF format. Convert to AVIF returns AVIF. The stated JPG output from Compress Image matches a listed input type for Convert to AVIF.
What if my JPG result does not open?
For a failed Compress Image result, first confirm that the download completed and that the viewer supports JPG. Try another local viewer for that format.
Record any error message for support. Keep private source material out of the report.
How do I report a problem with Compress Image?
Contact support with the Compress Image page name, source format and the error you saw. Mention any relevant form settings you chose. Do not send passwords or private attachments.