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imageresizer
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ImReso: Unlimited Target-Size Image Compressor
Resize & compress images/photos to a target KB or max width. Free, unlimited, privacy-first — only in browser, no server, no API, no signup.
ImReso ranks #23,108 among WordPress.org plugins with 30+ active installations, and was last updated Aug 17, 2026. Data from WordPress.org, refreshed twice daily — see methodology.
Tested up to WP 7.0.6 (Current: 7.1.2)
v1.0.18
Current Version v1.0.18
Updated 1 month ago
Last Update on 17 Aug, 2026
Refreshed 7 hours ago
Last Refreshed on
Rank
#23,108
—
No change
Active Installs
30+
+2900%
KW Avg Position
49.4
4.2 worse
Downloads
247
+2 today
Support Resolved
0%
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No change
Rating
0%
Review 0 out of 5
0
(0 reviews)
Next Milestone 40
30+
40+
5,145
Ranks to Climb
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Growth Needed
8,000,000
Active Installs
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- Version
- 1.0.18
- Last Updated
- Aug 17, 2026
- Requires WP
- 6.5+
- Tested Up To
- 7.0.6
- PHP Version
- 7.4 or higher
- Author
- imageresizer
Support & Rating
- Rating
- ☆ ☆ ☆ ☆ ☆ 0
- Reviews
- 0
- Support Threads
- 0
- Resolved
- 0%
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Frequently Asked Questions
Common questions about ImReso: Unlimited Target-Size Image Compressor
Yes. Select as many images as you like in the Media Library or "Add Media" dialog and each one is resized and compressed in your browser before upload. There is no per-image limit and nothing is queued on a server.
Yes. Set the "Max compress size" in the ImReso menu (default 500 KB) and the plugin searches the encoder quality so each image lands at about that size. Set it to 0 to use a fixed Quality value instead.
Yes — that is the whole point. All processing happens in your browser, so the free plugin makes zero external network requests. Your images are never sent to our servers or anyone else's.
No. It is genuinely unlimited — there is nothing to meter because the work runs on your own device.
It reads JPEG, PNG, WebP, AVIF, BMP, TIFF and HEIC/HEIF, and outputs WebP, AVIF or JPEG. GIF (animated or not), SVG, ICO and JPEG 2000 are left untouched and uploaded as-is.
Yes. HEIC/HEIF images are decoded and converted to WebP, AVIF or JPEG entirely in your browser, so they're viewable everywhere, and it is the converted file that gets stored — WordPress never sees the HEIC. The conversion needs JavaScript. If it cannot run, the plugin steps aside and the browser posts the original file; the plugin allows .heic/.heif through the upload filter so that attempt is not blocked, but whether a raw HEIC is accepted and thumbnailed after that is up to your server's image library, and many do not support it.
Not yet. This release resizes and compresses new uploads. Bulk optimization of the existing library is planned for a later release. AVIF seems slow on my phone. AVIF encoding is CPU-heavy. On mobile devices the plugin automatically prefers WebP for reliability. You can also fix the format to WebP in the ImReso menu.
No — images still compress, and you can confirm it from the savings figures. Some hosts (a few nginx setups in particular) do not yet map the .wasm extension to the application/wasm content type. When that happens the browser refuses to compile the codec while it downloads and falls back to loading it into memory first, which is a little slower on the very first image of a page and logs that message. The codecs are read from this plugin's own folder either way; nothing is fetched from anywhere else. Adding application/wasm wasm; to your server's mime types removes the message.
The original file is uploaded unchanged. Compression never blocks or breaks an upload.
Yes. Updates are delivered by WordPress.org like any other plugin from the directory — you will see them on the Plugins screen, and you can switch on "Enable auto-updates" there to have them installed for you. The plugin ships no updater of its own and contacts no server to check for updates.