Title: Default compression levels
Last modified: February 10, 2025

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# Default compression levels

 *  Resolved [wpnpc420](https://wordpress.org/support/users/wpnpc420/)
 * (@wpnpc420)
 * [1 year, 3 months ago](https://wordpress.org/support/topic/default-compression-levels/)
 * Hi,
 * I see that the “Optimal” (default) conversion setting has a 85% compression rate
   for WEBP, but I can’t seem to find what compression percentage there is for AVIF
   files when selecting “Optimal”.
 * Could you please give me this information? I’d like to know the percentage to
   see once I buy the Pro version, which conversion strategy I’ll choose.
 * Also, will it maybe be possible in the future to set a custom compression rate
   WEBP and AVIF conversions? I’d like to be able to play around and tweak the percentages
   to best suit my clients needs depending on the graphs in [this interestin](https://tsev.dev/posts/2023-11-10-should-avif-be-the-dominant-image-format/)
   [g](https://tsev.dev/posts/2023-11-10-should-avif-be-the-dominant-image-format/)
   [ article](https://tsev.dev/posts/2023-11-10-should-avif-be-the-dominant-image-format/).
 * Thanks in advance for your help!

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Author [Mateusz Gbiorczyk](https://wordpress.org/support/users/mateuszgbiorczyk/)
 * (@mateuszgbiorczyk)
 * [1 year, 3 months ago](https://wordpress.org/support/topic/default-compression-levels/#post-18297283)
 * Hi [@wpnpc420](https://wordpress.org/support/users/wpnpc420/),
 * Thank you for your message.
 * Quality 85% applies to converting to WebP format using the Gd or Imagick library.
   In the PRO version, images are not converted to AVIF format by the PHP library,
   but by our remote servers. We have special tools there to convert images to AVIF
   format. So the quality given in percentages is not a reference point there.
 * Our observations show that images in AVIF format are of better quality than images
   in WebP format, using the same quality levels. Additionally, the weight of AVIF
   files is about 50% smaller than WebP files.
 * We recommend using the default image optimization strategy. I do not entirely
   agree that the percentages in such an article are completely correct. They make
   sense if you were saving files in a graphics program and choosing different levels
   for different formats.
 * Best,
    Mateusz
 *  Thread Starter [wpnpc420](https://wordpress.org/support/users/wpnpc420/)
 * (@wpnpc420)
 * [1 year, 3 months ago](https://wordpress.org/support/topic/default-compression-levels/#post-18297295)
 * Thanks for all those details!

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Default compression levels’ is closed to new replies.

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## Tags

 * [compression](https://wordpress.org/support/topic-tag/compression/)
 * [default](https://wordpress.org/support/topic-tag/default/)

 * 3 replies
 * 2 participants
 * Last reply from: [wpnpc420](https://wordpress.org/support/users/wpnpc420/)
 * Last activity: [1 year, 3 months ago](https://wordpress.org/support/topic/default-compression-levels/#post-18297295)
 * Status: resolved