Compress Image to 300 KB
Get blog, portfolio and website images under 300 KB while keeping full HD detail. Choose JPG or WebP. Free, private, no upload.
Loading Compress Image to 300KB…
Your files never leave your device
How to use Compress Image to 300KB
- 1
Open Compress Image to 300KB on this page. It loads right in your browser.
- 2
Add your file, text or values and adjust the settings.
- 3
Copy the result or download it. Nothing is uploaded or stored.
How to compress an image to 300 KB online
300 KB is where images stop being a speed problem on most websites while still looking detailed on large screens. It is also the upper limit of several application portals that accept 20 to 300 KB. Drop your photos here; each one is saved as a JPG just under 300 KB, or as WebP if you switch the format.
Where a 300 KB limit shows up
- Blog and article images that must load fast
- Portfolio and gallery photos on personal sites
- Product galleries and landing page images
- Photo uploads for portals that allow up to 300 KB
How to compress a photo to 300 KB
- Drop your photos on the upload box, click to choose files, or paste an image with Ctrl+V. The target is already set to 300 KB.
- For website images choose Resize → Max and enter the widest size your layout shows, for example 1920 px; this also stops the tool from wasting bytes on pixels nobody sees.
- Each image is compressed automatically; the file list shows the new size next to the original.
- Drag the before/after slider to check the quality. The result line shows the new dimensions, the file size and the JPG quality that was used.
- Click Download, or Download all (ZIP) when you compressed several images.
What fits in 300 KB
300 KB comfortably holds a 1600 to 1920 px wide photo at high JPG quality, so full HD images look clean even on large monitors. If your site accepts WebP, switch Format to WebP: at the same 300 KB target you get roughly a quarter to a third more detail, or you can lower the target to around 200 KB for the same look. For photos with transparent areas, choose WebP rather than JPG, since JPG fills transparency with the background colour.
Behind the scenes the tool does not guess. If your photo is over 300 KB, it runs a quick search for the highest JPG quality (up to 80%) that still lands under the limit, keeping about 1.5% headroom so the portal's own byte count never tips it over. Only when even 35% quality is too big does it scale the width and height down, step by step, and search again. If you set an exact pixel size under Resize, the dimensions are never changed: the quality may go lower instead, and a warning appears if 300 KB cannot be reached at that size.
Tips for the best result at 300 KB
- Match the image width to your layout: a 1200 px content column never needs a 4000 px photo.
- For hero images with large sky or plain areas, 300 KB at 1920 px usually looks identical to the original.
- Keep file names meaningful for SEO; you can set a naming pattern under More options before you download the ZIP.
Private, free and unlimited
Everything runs in your browser. Your photos are never uploaded, camera and location data (EXIF) are removed from every result, and there is no sign-up, no watermark and no daily limit.
Converting a whole site to WebP? Try JPG to WebP or the website image optimizer. For exact full HD dimensions use the 1920 × 1080 resizer.
Features
- Preset target: every result stays under 300 KB
- Highest quality that fits, found automatically
- Keeps the pixel size whenever possible
- Optional exact width × height for form requirements
- Before/after slider with size, dimensions and quality
- Batch compress and download as ZIP
- 100% in your browser: nothing is uploaded
Frequently asked questions
What is a good image size for a website?
For most content images, 100 to 300 KB at 1200 to 1920 px wide is a good balance between speed and quality. This page targets the upper end of that range.
Can I compress to 300 KB in WebP instead of JPG?
Yes. Open Format and choose WebP; the target size still applies, and you usually get more detail for the same 300 KB.
Will my 1920 px image stay 1920 px?
In most cases, yes. The tool first lowers the quality; it only reduces the dimensions when even low quality would be above 300 KB.
Are my photos uploaded to a server?
No. The compression runs entirely in your browser, so your images never leave your device. Camera and location data (EXIF) are also removed from the result.
Which image formats can I compress?
The file picker accepts JPG, PNG, WebP, GIF and BMP; iPhone HEIC and TIFF files can be dragged onto the page. The 300 KB result is a JPG by default; you can switch to WebP or PNG under Format.