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JPEG to JXL at quality 100 grows files

Converting JPEG to JXL at quality 100 makes files larger than the original, and no true lossless JPEG recompression mode exists.

Tier II · Emerging Problems that are still building up.

3 public reports · first reported 28 May 2024 · last reported 30 August 2026

Idea report · $9 · No contacts · All sales final

See a sample idea report

What's going wrong

Users converting JPEG photos to JPEG XL with Switcheroo, a Linux image-format converter, report that the output can end up larger than the source.

AI-assisted: written with the help of AI from the reports. The idea report has the full summary.

In the idea report

  • The full summary.
  • The products the 3 reports are about, and how many came each month.
  • Related problems.

No business has been found with this problem yet, so the report has no contacts. All sales are final — no refunds. Pricing.