NiftyWebTools
Compress a PDF
Image tool
Convert images to WebP, JPEG or PNG in your browser. Batch files, tune quality, keep transparency where supported. Files stay on your device.
Processing mode: Private Runs in your browser
Free: up to 25 files, 25 MB each. With a pass: up to 200 files, 100 MB each.
Keep working
Compress Image
Make images smaller for websites, email, marketplaces, and forms.
Resize Images
Batch resize images by width, percentage, or common web-friendly dimensions.
Images to PDF
Create PDFs from JPG, PNG, WebP, AVIF and HEIC. Choose page order. Images are processed in your browser and stay on your device.
HEIC to JPG Converter
Convert HEIC to JPG free in your browser. Batch up to 50 iPhone photos, download as a ZIP. Files stay on your device. No watermark.
AVIF to JPG Converter
Convert AVIF to JPG free in your browser. Batch up to 50 images, choose the quality, download as a ZIP. Files stay on your device.
Visual guide
Choose WebP for smaller web assets, JPEG for broad compatibility, and PNG when transparency or lossless output matters.
How to use it
Good for
Use this image converter when the same source image needs to work in a different context. Convert PNG or JPEG screenshots to WebP for smaller website assets — Google's published benchmarks show WebP lossy images are 25–34 % smaller than comparable JPEG images at equivalent quality (SSIM), and WebP lossless images are 26 % smaller than PNGs. Create JPEG versions for upload forms that reject newer formats, or keep PNG output when transparency and lossless edges matter. The batch workflow is useful for product images, support screenshots, marketplace uploads, social thumbnails, client review assets, and image sets that need one consistent format before publishing. Conversion uses the browser's native Canvas API (HTMLCanvasElement.toBlob), supported by Chrome 50+, Firefox 19+, Safari 11+, and Edge 79+. No file ever leaves the device.
Privacy
Files are processed by your browser. They never reach our servers.
Questions
Choose WebP when you want to test a smaller format for a website. The result depends on the source image and quality setting. Choose JPEG for photos and older upload workflows where WebP is not accepted. Choose PNG when you need lossless output or transparency.
WebP often produces smaller files for web pages while keeping strong visual quality. That helps pages load faster, especially when you are converting product images, screenshots, or article graphics that do not need to stay in PNG or JPEG.
Transparency is preserved when the output format supports it. PNG and WebP support alpha transparency. JPEG does not, so transparent areas need to be flattened against a background when you choose JPEG.
JPEG is still useful for compatibility. Some older CMS fields, marketplace upload forms, e-mail builders, and internal tools accept JPEG but reject WebP. JPEG is also a familiar choice for photographs when transparency is not needed.
Browser canvas conversion usually outputs a fresh image without most embedded metadata such as camera EXIF, GPS data, and editing history. That can be helpful for privacy, but keep your original file if you need metadata preserved.
Yes. Multiple images can be converted in one run, and the result area lets you download converted files individually or as a ZIP.
Lossy targets such as JPEG and WebP recompress the image. The quality change and file size depend on the source and selected quality. PNG adds no compression loss to the pixels it receives. This converter decodes HEIC and HEIF through an intermediate JPEG, which can reduce quality. Use HEIC to PNG to avoid that added JPEG step. Compare the output at its intended display size before replacing the original.
No. Conversion runs in your browser using the Canvas API (HTMLCanvasElement.toBlob). Your source files and output files stay on your device. When you start converting HEIC or HEIF files, the browser downloads decoder code from this site. That request contains no file data. You can check these requests in the Network tab in DevTools. That is useful for confidential screenshots, private product images, and client assets.
Yes. HEIC and HEIF files are decoded in your browser first, then converted to the format you choose. For a dedicated HEIC tool with batch ZIP download, use HEIC to JPG.
Yes. Everything this tool does is free. On some tools, a Day or Project Pass raises the file-size and batch limits if you need more.