1920 × 1080, the most common screen resolution in the world. Unlike every print size, this one has no physical dimensions at all, and asking about its DPI is asking the wrong question.
Not applicable — a screen size has no physical dimensions
Aspect ratio
16:9
Where this size is used
Video frames, title cards and thumbnails for 1080p footage
Presentation slides and full-screen backgrounds
Desktop wallpapers and digital signage
Web hero images, where 1920 covers most desktop viewports
Resizing to 1080p Full HD
There is no DPI here
DPI converts pixels into a physical size, and a screen image has no physical size — the same 1920 × 1080 file is 24 inches wide on a monitor and 55 inches wide on a television. The pixel count is the whole specification.
This is why "save for web at 72 DPI" is meaningless advice that has outlived the hardware that motivated it. Browsers do not read the DPI tag. Setting it to 72, 300 or 1 changes nothing about how a screen image displays.
What does matter is the pixel dimensions relative to where the image will be displayed, and whether the display is high-density. A 1920-wide image shown across a 1920-pixel-wide viewport on a 2× screen is being displayed on 3840 physical pixels and will look soft.
16:9, and what it crops
1080p is 16:9, which is wide. A 3:2 camera photograph cropped to 16:9 loses about 11% of its height; a 4:3 phone photograph loses about 25%. That second number is large, and it is why phone photographs used as video backgrounds so often lose their subject's head.
If the image is destined for a 16:9 frame, compose with the extra height as deliberate slack rather than as part of the picture.
When to supply more than 1920
For a video timeline at 1080p, 1920 × 1080 is exactly right and anything larger is scaled down by the editor anyway.
For a web hero image, 1920 is the width of a common desktop viewport, not the width of the device pixels behind it. On a high-density laptop the same slot has 2560 or 3840 physical pixels, so a 1920 asset is upscaled by the browser and looks noticeably softer than the text beside it.
For a wallpaper, match the target screen rather than this preset. 1080p is right for a 1080p monitor and half the resolution of a 4K one.
Yes. Resizing JPG, PNG, and WebP images is completely free with no sign-up, no watermark, and no file limit. Resizing runs entirely in your browser, so there is nothing for us to charge for. Pro plans add the AI tools, but everyday resizing stays free forever.
Are my images uploaded to a server?
No. OpusImg resizes images on your own device using WebAssembly and your browser's own canvas. Your files never leave your computer or phone — there is no upload, no cloud processing, and nothing stored on our side. That makes it safe for confidential documents, client work, and personal photos.
How do I resize an image to exact pixel dimensions?
Choose the "By dimensions" mode and type the width and height you need in pixels. Leave the aspect-ratio lock on to keep the image's proportions — change one field and the other follows automatically. Turn the lock off when you need an exact, possibly non-proportional canvas, such as a specific banner size.
What is the lock aspect ratio toggle for?
When the lock is on, the width and height stay proportional: setting the width to 1000px updates the height to match the original shape, so the picture is never squashed or stretched. When the lock is off, you can set width and height independently, which is useful for fitting an exact canvas even if it distorts the image slightly.
Which resampling algorithm should I pick?
Use Lanczos for photographs — it produces the sharpest, most natural result and is the default. Bicubic is a fast, smooth alternative handled by your browser. Choose Nearest neighbour only for pixel art, sprites, or icons where you want hard edges and no blending between pixels when scaling up.
What does the DPI setting do?
DPI (dots per inch) is metadata that tells print software how large to print the image. It does not change the pixel dimensions or how the image looks on screen — 72 DPI is standard for the web, while print shops usually want 150 or 300 DPI. We embed the value you choose into the file (PNG and JPG) so a print workflow reads the right density.
Can I resize for Instagram, YouTube, or other platforms?
Yes. The "By preset" mode includes 18 ready-made sizes — Instagram square, portrait, and story; Facebook and LinkedIn covers; X/Twitter headers; YouTube thumbnails and channel art; Pinterest pins; plus HD, QHD, and 4K. Pick a preset and your image is resized to the exact canvas that platform expects.
Will resizing reduce image quality?
Making an image smaller (downscaling) keeps it looking crisp — Lanczos and bicubic both average pixels cleanly. Making it larger (upscaling) can only invent so much detail, so very large enlargements look soft; for big upscales the AI upscaler in Pro reconstructs detail far better. We encode the result at high quality so the resize itself adds no visible compression artifacts.
Can I resize many images at once?
Yes. Drop a whole folder and apply one target to the batch. In percentage mode every image is scaled by the same percentage, so each keeps its own aspect ratio; in dimensions or preset mode every image is fitted to the same canvas. Results are bundled into a single ZIP for download, all processed on-device.
What formats can I resize?
You can drop in JPG, PNG, WebP, AVIF, GIF, BMP, TIFF, and HEIC. Each file is decoded in your browser, resized, and re-saved — JPG and HEIC come out as JPG, PNG/BMP/TIFF as PNG, and WebP/AVIF/GIF as WebP, so the result always opens everywhere. To change format deliberately, use the converter tool linked below.