README

webp8 is a command line tool to convert images to webp format

how to install

You have the choice between:

• composer install composer require 8ctopus/webp8
• download the phar
• or build it yourself

curl -LO https://github.com/8ctopus/webp8/releases/download/1.2.0/webp8.phar

# check hash against the one published under releases
sha256sum webp8.phar

# make phar executable
chmod +x webp8.phar

# rename phar (from here on optional)
mv webp8.phar webp8

# move phar to /usr/local/bin/ (optional)
mv webp8 /usr/local/bin/

Windows only

• download and extract cwebp.exe from libwebp
• add cwebp.exe to PATH (sysdm.cpl -> Advanced -> Environment Variables)
• download webp8

curl -LO https://github.com/8ctopus/webp8/releases/download/1.2.0/webp8.phar

• check hash against the one published under releases

convert images to webp

./webp8 convert [--cwebp_m] [-cwebp_q] [--cwebp_z] [--multithreading] directory

[▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓] 15843/15843 (100%) -   1 hr/1 hr   - 6.0 MiB

[OK]

------- ----------- --------- ------------- ------- --------------- -----------
 total   converted   skipped   webp bigger   time    size original   size webp
------- ----------- --------- ------------- ------- --------------- -----------
 15843   15843       0         235           64:20   1.2 GB          150.3 MB
------- ----------- --------- ------------- ------- --------------- -----------

NOTE: converted images that are bigger in webp format are automatically deleted since the whole point is to get smaller images. You can see the bigger images in the webp bigger column.

delete existing webp images

./webp8 cleanup [--dry-run] [-v] directory

htaccess code to show webp instead of png/jpg when browser supports

Code adapted from webp-express

RewriteEngine On

# redirect images to webp when possible
# check if browser accepts webp
RewriteCond %{HTTP_ACCEPT} image/webp

# check if requested file is jpg or png
RewriteCond %{REQUEST_FILENAME} \.(jpe?g|png)$

# check if webp for image exists
RewriteCond %{REQUEST_FILENAME}\.webp -f

# serve webp image instead
RewriteRule . %{REQUEST_FILENAME}\.webp [T=image/webp,E=EXISTING:1,E=ADDVARY:1,L]

# make sure that browsers which do not support webp also get the Vary:Accept header
# when requesting images that would be redirected to existing webp on browsers that does.
SetEnvIf Request_URI "\.(jpe?g|png)$" ADDVARY

# Apache appends "REDIRECT_" in front of the environment variables defined in mod_rewrite, but LiteSpeed does not.
# So, the next lines are for Apache, in order to set environment variables without "REDIRECT_"
SetEnvIf REDIRECT_EXISTING 1 EXISTING=1
SetEnvIf REDIRECT_ADDVARY 1 ADDVARY=1

# Set Vary:Accept header for the image types handled by WebP Express.
# The purpose is to make proxies and CDNs aware that the response varies with the Accept header.
Header append "Vary" "Accept" env=ADDVARY

for development

build bin

• bump version
• run ./build.sh

debug code

php src/EntryPoint.php convert -- images

# cleanup test dir
git clean -xfd images

improvement ideas