Batch Image Converter
Convert multiple images at once. Support WebP/JPG/PNG interconversion, resize, text watermark, color balance. Download as ZIP. Free online batch image converter.
Drop images here or click to browse
Supports: WebP, JPG, PNG, BMP, GIF ยท Select multiple ยท Max 20MB each
Frequently Asked Questions
How many images can I convert at once?
There's no hard limit โ you can convert as many images as your browser can handle. Each image must be under 20MB. For best performance, we recommend batches of 50-100 images at a time. The tool processes them sequentially to avoid memory issues.
What formats can I convert between?
You can convert to JPG, PNG, or WebP. Source images can be in WebP, JPG, PNG, BMP, or GIF format. JPG is best for photos (smaller files), PNG preserves transparency (lossless), and WebP offers the best compression with modern browser support.
How does the text watermark work?
Enable "Add watermark", type your text, then customize font size, color, opacity (10-100%), rotation (-90ยฐ to 90ยฐ), and position (9 positions on a 3ร3 grid). The watermark is applied to every image in the batch. Great for adding copyright notices or logos.
What is Color Balance adjustment?
Color Balance lets you independently adjust the Red, Green, and Blue channels in three tonal ranges: Shadows (dark areas), Midtones (middle tones), and Highlights (bright areas). This is similar to Photoshop's Color Balance feature โ useful for color correction or creative effects across all images in the batch.
Can I download all converted images at once?
Yes! After conversion, click "Download ZIP" to get all converted images in a single ZIP file. You can also download individual images by clicking the download button next to each file in the list.
Are my images uploaded to a server?
No. All image processing โ format conversion, resizing, watermarking, color balance โ happens entirely in your browser using the Canvas API. Your images never leave your device. The ZIP file is also generated locally using JSZip.