Image Resizer and Compressor
Choose an image, set a max width and quality, and download the optimized result.
Choose an image to start.
Preview![Resized image preview]()
Image tool
Image Resizer and Compressor
Resize and compress images right in your browser - no upload, fully private.
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How To Use The Image Resizer
Click Choose image and pick a photo, screenshot, or graphic from your device. Type the maximum width you want in pixels — the height adjusts automatically so the picture is never distorted. Choose an output format (keep the original, or convert to JPEG, WebP, or PNG) and drag the quality slider to balance sharpness against file size. The preview and new file size update as you change the settings, and when you are happy with the result you press Download image to save it. Nothing is sent anywhere — the entire job is done on your own machine.
How Resizing And Compression Work
Two separate things shrink an image, and this tool does both. Resizing reduces the pixel dimensions: a 4000-pixel-wide camera photo scaled to 800 pixels has roughly a twenty-fifth of the pixels, which alone cuts the file dramatically. Compression then decides how much data is spent describing those remaining pixels. JPEG and WebP are lossy, meaning they discard fine detail the eye barely notices in exchange for much smaller files, controlled by the quality setting. PNG is lossless, so it preserves every pixel exactly but produces larger photos. The resizer redraws your image onto an HTML canvas at the new size and re-encodes it in the format you chose.
Common Target Sizes
You rarely need a 4000-pixel image. Most uses have a sensible target width, and matching it keeps files small and pages fast. These are good starting points for the max width field.
| Use case | Suggested width | Notes |
|---|---|---|
| Profile avatar | 512 px | Square crop; displayed small, so this is plenty |
| Full HD / 1080p | 1920 px | Wallpapers and full-width hero images |
| Blog or article photo | 1200 px | Sharp on most screens without bloating the page |
| Social thumbnail | 600 px | Feed previews and link cards |
| Email attachment | 1024 px | Readable while staying under size limits |
Set the width and the height follows automatically — you never have to calculate it yourself.
Worked Example: A 6 MB Photo For The Web
Say you have a 4032 × 3024 phone photo that weighs about 6 MB — far too heavy for a web page. Set the max width to 1200, choose WebP, and leave quality near 80%. The tool scales the image to 1200 × 900, preserving the original 4:3 shape, and re-encodes it. The download is typically well under 200 KB — a reduction of more than 95% — while still looking sharp on screen. If you needed transparency or a screenshot with crisp text instead, you would pick PNG and skip the quality slider entirely.
Why This Tool Is Useful
Oversized images are one of the most common causes of slow web pages, failed uploads, and full inboxes. A single modern phone photo can be several megabytes, yet a web page or email rarely needs more than a few hundred kilobytes. Resizing to a sensible width and compressing to a reasonable quality can shrink a file by well over 90% with no visible difference at normal viewing size. That means faster pages, happier visitors, smaller storage bills, and attachments that actually send — without opening a heavy desktop editor or learning its tools.
Accuracy And Privacy
Everything runs locally in your browser through an HTML canvas. Your image is read from your device, redrawn at the new dimensions, and encoded into the chosen format entirely on your computer — there is no upload, no server, and nothing is stored or logged. That makes the tool safe for private photos, ID scans, screenshots, and confidential documents. The output is a standard JPEG, PNG, or WebP file you can use anywhere, and the aspect ratio is computed exactly from the original so the result is never stretched.
FAQ
Does resizing reduce image quality?
Making an image smaller in pixels is generally safe because you are discarding detail you no longer need, and it still looks crisp at the new size. Quality loss comes mainly from compression: JPEG and WebP are lossy, so a very low quality setting adds visible blur and blocky artifacts. Keeping the slider around 75–85% gives photos that still look clean. Enlarging beyond the original width, however, cannot add detail and will look soft.
Does this tool keep the aspect ratio?
Yes. You set only a maximum width, and the height is calculated automatically from the original proportions, so the image is never stretched or squashed. A 4000 × 3000 photo with a max width of 800 becomes exactly 800 × 600. The original ratio is always preserved.
Which image formats are supported?
You can load JPG, PNG, WebP, and most other formats your browser can decode, including BMP and GIF. On export you can keep the original or convert to JPEG, WebP, or PNG. WebP usually gives the smallest file at the same visual quality, JPEG is the most universally compatible for photos, and PNG is best when you need a lossless image or transparency.
Are my images uploaded to a server?
No. The whole process runs locally in your browser using an HTML canvas. Your file is read, redrawn at the new size, and encoded into the output format without any network request. Nothing is uploaded, stored, or logged, which makes the tool safe for private photos, screenshots, and confidential documents.
Why does PNG ignore the quality slider?
PNG uses lossless compression, so it has no quality dial to trade detail for size the way JPEG and WebP do. The slider only affects lossy formats. For the smallest possible photo, choose JPEG or WebP and lower the quality. Keep PNG for screenshots, logos, line art, and anything that needs transparency or pixel-perfect edges.