Is JPG compression free?

Yes. FileShrinkr is free with no signup. Compress as many JPGs as you need and download the results immediately.

Will compressing JPG reduce quality?

JPG is lossy, so some detail is removed to save space. At the default quality on this page, photos usually look fine on screens and in typical upload forms.

Can I compress PNG or HEIC here?

Yes. The tool accepts many input formats and exports JPG when you use this page preset. For PNG output, use the main compressor and choose PNG.

Compress JPG Online — Free Image Optimizer

JPEG compression (canvas → PDF) 80%

Lower = smaller file, more soft/blocky pages. Higher = sharper pages, larger file. 100% = least JPEG compression (still JPEG, not lossless).

More compression Balanced No compression (100%)

Render zoom (pdf.js supersample) 150%

Pages are drawn larger than the output width, then downscaled before JPEG. Higher zoom = sharper text, slower + more memory (up to 500%). 100% = no supersample.

100% (faster) 150% 500% (max detail)

AVIF → JPEG bridge — when supported, try canvas→AVIF→JPEG per page and keep the smaller JPEG (AVIF still isn’t stored inside the PDF). Retry stronger if needed — if the first pass isn’t smaller, run one stronger pass (lower width + JPEG quality).

Compress JPG

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