kittokit
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Runs local · no upload

Crop an image

Drag a frame over the picture, lock it to a ratio or type the four pixel values, and download the cut at full resolution.

Tool

How It Works

  1. 01

    Pick a preset

    Aspect ratios from 1:1 to 9:16, or a finished size for Instagram, YouTube, TikTok, LinkedIn, Facebook, X, Pinterest and a passport frame. All of it before you choose a file.

  2. 02

    Set the frame

    Drag the frame over what should stay. Eight handles resize it, and with a ratio set the shape holds. Guide lines for thirds or the golden ratio can be switched on.

  3. 03

    Save

    PNG saves losslessly, JPG and WebP have a quality slider. The download carries the resolution of the cut, no watermark, no camera or location data.

Privacy

Your image never leaves the browser tab. It is decoded locally, cropped locally and rewritten locally. No upload, no server, no sign-up.

A thumbnail has to be 1280 by 720, a passport frame 35 by 45 mm. On most crop tools you only find out whether they know those numbers after your photo already sits on someone else's server. Here every ratio, every platform size and all four pixel fields are on screen before you pick a file.

01: How to Use

How do you use this tool?

  1. Pick an aspect ratio or a platform size, all of it works before you choose a file
  2. Drop an image or pick it from the file browser, up to 50 MB
  3. Drag the frame, resize it at the eight handles, or type the pixel values
  4. Choose a format: PNG is lossless, JPG and WebP have a quality slider
  5. Download at the resolution of the cut, with camera and location data stripped

Why the controls come before the picture

Nearly every crop tool on the web opens with an empty drop area. Whether it knows 4:5, whether it will tell you a pixel count, whether it has a passport frame, you find out after your photo already sits on a stranger’s server. That is the wrong order.

Here the whole control surface is on screen from the first second: every aspect ratio, every platform size, the four pixel fields, the format choice and the guide lines. You can click through and decide whether the tool does what you need before handing anything over. And when you do decide, the picture still stays in the tab.

How to crop to a fixed aspect ratio

You choose the ratio before you drag. The frame then locks and can only change in proportion, at any of the eight handles. On offer are 1:1, 4:3, 3:2, 16:9, 4:5, 3:4, 2:3, 9:16 and 35:45. Free allows any shape, Original takes the ratio of the picture you loaded.

If you need a finished pixel count rather than a proportion, take a size preset. Instagram post 1080 by 1080, portrait 1080 by 1350, story 1080 by 1920, YouTube thumbnail 1280 by 720, YouTube channel banner 2560 by 1440, TikTok 1080 by 1920, LinkedIn banner 1584 by 396, Facebook cover 851 by 315, X header 1500 by 500, Pinterest pin 1000 by 1500. A preset like that fixes the ratio and the output pixels at once.

When the frame you dragged is smaller than the target, the tool says so first. Scaling up invents no sharpness, it spreads the pixels you have over more area. Better to drag the frame wider or take a smaller preset.

What is the difference between cropping and resizing?

Cropping removes areas at the edge. What is left stays unchanged pixel for pixel, the picture only gets smaller because less of it is there. Resizing keeps the whole content and recalculates every pixel onto a new grid. That interpolates, and fine structure like hair, text or brickwork goes soft.

So the division of labour is clear. To change what is in frame, crop. To hit a particular edge length or file size, resize. A 4000 by 3000 photo that should become a YouTube thumbnail needs both, first 16:9, then 1280 by 720. That is exactly what a platform preset does here in one step. Without a preset the cut keeps the resolution of the original. For plain resizing there is a dedicated page, Image resizer.

What size should a passport photo be?

Passport sizes differ by country, and this tool does not decide for you. It gives you the proportion and the pixel count, nothing beyond that.

Germany and much of Europe use 35 by 45 mm. That ratio is available as a preset, and as a size preset it becomes 827 by 1063 pixels, which is 35 by 45 mm at 600 dpi. The United States uses 2 by 2 inches, a square, so the 1:1 ratio covers it. Official requirements are published by the issuing authority; for the US that is the State Department photo requirements.

The preset sets proportion and pixel count. It does not check head height, gaze direction, background or lighting against any rulebook, and it does not replace a photographer when an official document is at stake.

What happens when you save

The cut is taken from the original image, not from the scaled-down preview on screen. The saved file has exactly the pixel dimensions of the selected area. Cropping on its own costs no sharpness, because nothing is recalculated.

Rewriting the file does cost something, but only with JPG and WebP. JPG is lossy, and every save is another generation. PNG is lossless and is therefore the choice when the picture will be edited again later. The quality slider appears only for JPG and WebP; for PNG it would do nothing.

Saving rebuilds the picture from its pixels. Capture location, capture time, camera model and the small embedded preview thumbnail do not survive that. The embedded thumbnail is the one hardly anyone thinks about: it often still holds the unedited version. To strip metadata without cropping, there is Remove metadata.

The rotation flag from the camera is read first. A portrait photo from a phone therefore stands upright, and the frame lands where it sat on screen.

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