When should I resize WEBP?

When your layout slot is smaller than the source image — serving oversized WEBP wastes bandwidth even though the format is efficient.

Resize WEBP Online — Scale Modern Web Images

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).

Resize WEBP

🔍 Interactive Quality Inspection (Slide to Compare)

Compression Complete!

Crop

Resize

Transform

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Frequently asked questions

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