About Sajinbaro

• Resize an image: Change the pixel width and height of a JPEG, PNG or WebP image while keeping its aspect ratio, and see the real output file size before you download. The image is processed in your browser and never uploaded.
• Compress an image: Re-save an image as JPEG or WebP at the quality you choose and see the real output size and how much smaller it got. If the result is larger, you are told. Nothing is uploaded — it all happens in your browser.
• Convert image format: Convert images between JPEG, PNG and WebP. When a transparent PNG becomes a JPEG you choose the background colour. The real saved format and size are checked before download, and the image never leaves your device.
• Compress an image to a target file size: Get an image under a size limit such as 100 KB, 200 KB or 500 KB. The highest quality that fits is found automatically, and the image is scaled down only if quality alone is not enough. Processed in your browser, never uploaded.
• Crop an image: Keep only the part of an image you need. Drag a free-form or 1:1, 4:3, 3:4 or 16:9 area, or type exact pixel coordinates, and check the real output resolution and file size before you download. Nothing is uploaded.
• Rotate and flip an image: Turn a sideways photo 90° left or right or 180°, or flip it horizontally or vertically. Undo any step, check the size after rotation and download. The image is processed in your browser and never uploaded.
• Pixelate or black out parts of an image: Drag to select one or more areas to hide, choose the mosaic strength, or black them out so nothing of the original remains. The result is saved as a single flat image, and nothing is uploaded.
• Fit a product photo to an exact size: Place a product photo inside an exact canvas such as 1000×1000, centred with its aspect ratio kept, and fill the rest with white, another colour or transparency. Nothing is stretched, the margin is adjustable, and the saved file is checked against the requested size.

It does not upload or store images, process many images at once, retouch them, apply filters or add text, or handle HEIC, GIF or SVG files. Removing camera information (EXIF) is a goal but not guaranteed. It does not provide official photo specifications for passports, visas or ID documents — check the requirements of the organisation you are submitting to.

• Images are opened and saved again only inside your browser. They are never sent to a server.
• The processing rules (aspect-ratio calculation, reduction rate) are shown on each page and checked by automated tests.
• The work, preview and download screens carry no ads and no third-party analytics.

Sajinbaro started as a Korean service, and the same tools are available in Korean at 사진바로. The English pages share the same processing code.

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