拖拽图片到这里
或点击选择文件
选择图片后开始处理
Batch compress, convert, watermark, resize images
Runs locally · Nothing uploaded
An online batch image processor that compresses, converts, resizes and watermarks multiple images in one pass. Compression lowers file size by adjusting JPEG/WebP quality, which is handy before uploading to a website, sending by email or submitting a form. Conversion unifies images to JPG, PNG or WebP; resize scales by percentage or maximum width while keeping the aspect ratio; watermark adds text with configurable size, color, opacity, rotation, nine-grid position or tiling. Everything runs locally in the browser, so contracts, ID photos and product shots never leave your device.
Compression and conversion re-encode the image, so quality depends on the quality setting. Resize resamples to the target size, and watermark keeps the original resolution and only overlays text. Output PNG when you need lossless results.
There is no hard limit, but many high-resolution images at once use a lot of memory. Keep batches to a few dozen images, or split very large photos into several runs.
Yes. Watermarks are drawn with local browser fonts, so Chinese, English and digits all work. If a font is missing the browser may fall back to a default face.
No. Reading, Canvas redrawing and Blob creation all happen in the browser. There is no upload endpoint, and temporary data is released when you close the page.
Downloads are prefixed with processed_ and keep the original name to avoid overwriting your source files. The extension follows the selected output format.