Compress a JPG without changing its dimensions
Reduce a JPG file for websites, email, forms, or storage while keeping the original pixel dimensions.
Choose a quality level from 60 to 90. If recompression would create a larger file, NetroDoc returns the original bytes instead.
How to compress a JPG
Upload the JPG
Choose one valid JPG or JPEG image.
Choose the quality
Lower quality normally produces a smaller file.
Download the result
Save the compressed JPG after NetroDoc verifies the output size.
How JPG compression works
The image is decoded, orientation metadata is applied, and the pixels are encoded as progressive JPEG with optimization enabled.
JPEG compression is lossy. Re-encoding may remove metadata and can introduce visible artifacts at lower quality settings.
When to compress JPG
Website uploads
Reduce photo size before uploading to a website or CMS.
Email attachments
Create a smaller attachment without resizing the image.
Online forms
Fit a photo under a portal or form file-size limit.
Temporary server-side processing
The uploaded image is processed in a temporary working directory and is not intentionally sent to a third-party conversion API.
Temporary files are removed after the response is completed or when processing fails. No account is required.
Privacy →Compress JPG FAQ
Does compression change the dimensions?
No. Width and height remain unchanged.
Can the result be larger?
No. If the encoded result is not smaller, NetroDoc returns the uploaded JPG unchanged.
Is JPG compression lossless?
No. JPEG uses lossy compression, and lower quality settings discard more image detail.