Compress JPG images

About this tool

Re-encode supported JPG files with a lower quality setting and compare actual savings.

Supported input

JPG

Output format

JPG

Batch size

Up to 5 files; format and combined limits below still apply.

How it works

1. Add JPG files in Input. Review each thumbnail and its validation status.
2. Choose JPG quality; if transparency is supported, choose its background colour.
3. Create the selected files. Compare original and result, then download an individual file or ZIP. Changing settings marks older results out of date.

Supported files and limits

Up to 5 files, 10 MiB each and 25 MiB combined. Each image must fit within 8192 pixels per side and 20 million pixels; a batch is limited to 40 million input pixels. Output is limited to 20 MiB per file and 50 MiB combined. One isolated image job runs at a time, with a 30-second timeout and cancellation.

A practical example

Try a lower JPG quality on a photograph and compare the measured output size. Inspect fine hair, gradients and lettering at full size before accepting a smaller result.

Troubleshooting this tool

A quality value is encoder-dependent and is not a promised compression percentage. An already efficient JPG may become larger or visibly worse after another export.

JPG input supports 8-bit baseline/progressive RGB or grayscale. EXIF/ICC/multi-picture metadata and CMYK are currently rejected, so orientation and colour profiles are not silently discarded. Export an unprofiled copy from your image editor if needed.

Check the actual export

Size reduction is not guaranteed, particularly for an already optimized JPG. Lower quality can introduce artifacts. Inspect downloaded dimensions, transparency and fine edges before replacing an original. Browser encoders differ; a quality setting is not a universal fidelity score, and file size may increase.

Files stay in your browser

No file bytes are uploaded. Ordinary work stays in memory. Choosing a “Continue” action saves that result in this browser for up to 30 minutes, so another compatible working tool can use the actual output. Saved workflows are limited to 50 MiB and 20 files; clear them in Output. Expired entries are removed on later tool visits. Clearing references is not a secure-erasure promise.

If a file fails

Check its actual format and the restrictions above. Renaming a file does not convert it. A failed file does not erase successful batch results. If processing times out, cancel and try fewer or smaller files. A current browser with worker canvas support is required.

Before you use the download

• Compare the actual output byte size with the source; a new encoding can be larger.
• Inspect fine edges, gradients and any transparency background in the downloaded JPG file.

Tools that accept this output

These links use this tool's default output format, subject to each next tool's supported variants and limits. If you change the export format, use Continue in Output to see compatible actions for the actual result. Opening a link below starts another tool without transferring a file.

• Convert JPG to PNG — Decode a supported JPG into a PNG without adding further lossy JPG encoding.
• Convert JPG to WebP — Create a static WebP from a supported JPG and compare the actual size and quality.
• Resize JPG images — Resize supported JPG files with independent dimensions or locked proportions.

Need help with this operation? Contact Pro Edit Tools Support with a non-sensitive description of the problem.