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61 browser tools Works on mobile Free to use

No File Logs

We do not upload, store, or track the files you process.

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Built for trust with clear local limits.

Image Tools / Stable

Compress Images Online

Reduce image size by choosing an output format, quality level, and optional dimensions.

Quick answer

What does Compress Image do?

Reduce image size by choosing an output format, quality level, and optional dimensions. The selected image is processed locally in this browser without being sent to a backend conversion server. Stronger lossy compression can introduce blur, ringing, or block artifacts.

Use Compress Image when you need to reduce image file size with format and quality controls. Common uses include prepare images for email, meet a website upload limit, create lighter web assets.

Input: image
Processing: In this browser
File upload: No
Price: Free

Designed around the task

Why use Compress Image?

Focused controls, local processing, and clear limits help you finish the job without sending the document to a conversion server.

Focused results

Re-encodes image pixels with the selected format and quality.

Useful browser controls

Can reduce pixel dimensions when resizing is requested.

Desktop and mobile

Use Compress Image in a current desktop or mobile browser without installing a separate app.

Simple local workflow

Create an output you can inspect before sharing.

Private by design

The selected image is processed by JavaScript running in this browser for Compress Image. NoLogPDF does not send it to a backend conversion API, and file names, contents, form values, passwords, and output data are excluded from site analytics.

Automatic file recognition

NoLogPDF checks the selected file in your browser and shows the controls available for Compress Image.

How to use Compress Image

Choose one or more images.
Select the output format and quality.
Adjust dimensions when a smaller pixel size is acceptable.
Compress, compare, and download the result.

What Compress Image changes

Re-encodes image pixels with the selected format and quality.
Can reduce pixel dimensions when resizing is requested.

Browser-only privacy

Limits to know before using Compress Image

Stronger lossy compression can introduce blur, ringing, or block artifacts.
Already-small images may not shrink and lossless PNG can remain larger than JPG or WEBP.

Common uses for Compress Image

Prepare images for email.
Meet a website upload limit.
Create lighter web assets.

Next step: Continue this workflow with Crop Image.

Compress Image questions

How does Compress Image work?

Reduce image size by choosing an output format, quality level, and optional dimensions. Choose one or more images. Select the output format and quality. Adjust dimensions when a smaller pixel size is acceptable.

Does Compress Image upload my image?

No. The selected image is read by code running in this browser for this operation. NoLogPDF does not send it to a backend conversion API or include document data in analytics.

What does Compress Image change in the output?

Re-encodes image pixels with the selected format and quality. Can reduce pixel dimensions when resizing is requested.

What limits should I know before using Compress Image?

Stronger lossy compression can introduce blur, ringing, or block artifacts. Already-small images may not shrink and lossless PNG can remain larger than JPG or WEBP.

Published and maintained by NoLogPDF

How this tool page is checked

The instructions describe this browser implementation, its expected output, and its known limits. Core workflows are exercised with local fixtures, output files are validated where the format allows, and mobile behavior is checked at a narrow viewport.