Compress Image for WordPress — Free Online

Measure the intended display area before choosing how many pixels to retain. A file that is too small can look soft on a dense screen, while a much larger file may contain detail the layout never displays. This tool prepares a single asset; it does not generate every responsive variant or configure which image the theme selects for different visitors.

WordPress manages uploaded assets through its image and Media Library workflow. After uploading your copy, inspect the published page and verify which file is being served. A caching layer, existing attachment or image plugin may keep a previous version visible. Replacing a local file does not automatically update all references in existing posts.

For diagrams and transparent artwork, compare the output against the source before accepting the WebP default. Retain an alternative format when required by your server or publishing setup. Use Compress Image for Google PageSpeed when investigating a specific performance report. This page does not install a plugin, change alt text or fix layout shifts; those tasks belong to the site’s publishing and implementation workflow.

Open one JPG, JPEG, PNG or WebP and review the preset before starting. A target is a maximum file budget, not an exact output weight. These pages use decimal units: 1 KB is 1,000 bytes and 1 MB is 1,000,000 bytes. You can change the target, select the output format and switch optional resizing on or off. Where a maximum long edge is preset, both dimensions scale together and smaller sources are not enlarged. Use Resize Image first when an exact canvas or crop is required.

The compressor tries encoding settings and measures their output. JPEG and WebP can discard detail; PNG compression may reduce the color palette. A demanding byte budget can also trigger proportional downscaling, even after you choose starting dimensions. The result shows the final dimensions and whether the maximum was met. An unsuccessful attempt remains clearly marked; choosing a bigger budget or changing dimensions may be necessary. JPEG puts transparency on white. For HEIC or AVIF, use Image to JPG before opening the result here.

Compare fine text, edges and important details before downloading. A smaller number is useful only if the image remains suitable for its destination. Return to the original when trying another setting, rather than repeatedly compressing the last copy. An already-fitting source is returned unchanged, including metadata, only when its format and dimensions also need no change. Processing is free and local to your browser, without signup or image uploads to our processing servers. The tool handles one file at a time and does not replace files in your library, upload to another account or submit a form for you.