Question 1

How do I compress a JPEG without losing quality?

Accepted Answer

Set the quality slider to 75%–85%. At this range, JPEG compression artifacts are invisible to the human eye, while file size is typically reduced by 50–70%. Our before/after preview lets you compare quality before downloading.

Question 2

What is the difference between JPEG and JPG?

Accepted Answer

There's no technical difference — JPEG and JPG are the same format. ".jpg" is just a shortened version of ".jpeg" introduced because early Windows systems only supported 3-character file extensions. Both work fine with this tool.

Question 3

Can I compress a JPEG to a specific file size (e.g. under 100 KB)?

Accepted Answer

Yes, adjust the quality slider downward until the compressed size shown in the results falls under your target. A starting point: quality 60% typically yields files around 100–300 KB for standard photos, depending on image dimensions.

Question 4

Does JPEG compression affect image dimensions?

Accepted Answer

No — unless you set a maximum width in the advanced options, compression only reduces quality, not dimensions. Your image will remain the same pixel width and height.

Question 5

Is JPEG the best format for photos?

Accepted Answer

JPEG is excellent for photographs and complex images. For images with transparency or text/graphics, PNG or WebP is better. WebP offers similar quality to JPEG at 25–35% smaller file sizes, making it the best choice for web use. Use our WebP Converter to switch formats.

Free JPEG Compressor Online

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