Convert Images Online — Free & Private

What this tool does

Convert PNG to JPG, WebP to PNG, HEIC to JPG and more — instantly in your browser. No upload, no server, 100% private. Supports JPG, PNG, WebP, AVIF and HEIC.

Private browser-based processing

Your images are processed locally in your browser. Files are not uploaded to PhotoTools.org servers, and the finished result is generated on your device.

PNG, JPG, WebP, AVIF and HEIC explained

Image formats are not just file extensions. They are different ways of describing pixels, color, transparency and compression. PNG is a lossless format, which means it preserves every pixel exactly and is ideal for screenshots, logos, interface captures and graphics with sharp edges. JPG, also called JPEG, is a lossy photo format. It creates much smaller files by discarding image detail that is usually hard to notice in natural photos.

WebP and AVIF are newer web-first formats. WebP often produces a smaller file than JPG at the same visible quality and can also support transparency. AVIF usually compresses even better, especially for large photos, but it can take longer to encode. HEIC is common on iPhones because it stores high-quality photos efficiently, but many websites and older apps still prefer JPG or PNG for compatibility.

Why convert PNG to JPG or WebP

PNG files are excellent when accuracy matters, but they can become very large for photos. A camera photo saved as PNG may be many times larger than the same image saved as JPG because photographic detail does not compress well with PNG lossless rules. Converting a photo-like PNG to JPG, WebP or AVIF can reduce upload time, email attachment size and website bandwidth without changing the visible dimensions.

The best output format depends on where the file will be used. JPG is the safest choice when you need maximum compatibility. WebP is a strong default for modern websites because it is widely supported and usually smaller than JPG. AVIF is useful when every kilobyte matters and your audience uses modern browsers. PNG remains the right answer when you need transparency, crisp text or repeated editing without generation loss.

How browser-based conversion works

PhotoTools decodes your image in the browser, draws the pixels to a canvas, and exports a new file in the format you choose. This is different from server-side converters that upload the original image to a remote machine. Browser-based conversion keeps the work on your device, which is especially useful for private photos, identity documents, product images and screenshots that may contain sensitive information.

Canvas export also explains why metadata is often removed during conversion. The browser focuses on pixel data, not camera metadata such as GPS coordinates or device model. In practical terms, format conversion usually gives you a clean image file with the visible content preserved and unnecessary metadata stripped away.

Quality settings and visible loss

When exporting to JPG, WebP or AVIF, the quality setting controls the balance between file size and visual detail. A higher number keeps more detail but creates a larger file. A lower number compresses harder and may introduce blockiness, blur or color banding. For everyday photos, JPG quality around 85 to 92 is a good starting point. For thumbnails, lower settings can be acceptable. For print or future editing, use a higher setting.

Lossy compression is most visible around sharp edges, small text, QR codes and flat color blocks. If your source image is a screenshot, chart or logo, PNG or lossless WebP may be better than JPG. If your source image is a natural photograph, JPG, WebP or AVIF usually gives a much smaller file with little visible difference.

Private conversion workflow

The conversion tool is designed for a local-first workflow. You can drop several files, choose the output format, tune the quality and download the results without creating an account. The original files stay in your browser session and are not uploaded to PhotoTools servers. If you close the tab, the temporary working data disappears with the page.

For best results, keep an original copy before converting. Use JPG or WebP for sharing, PNG for transparent graphics, and AVIF when you are optimizing for modern web delivery. If a platform rejects HEIC uploads, converting the file to JPG is usually the fastest compatibility fix.

Common conversion mistakes to avoid

The most common mistake is treating conversion as a magic quality upgrade. Converting a low-resolution JPG into PNG will usually make the file larger, but it will not restore detail that was lost earlier. Likewise, saving a transparent PNG as JPG removes transparency because JPG has no alpha channel. If the image needs a transparent background, use PNG, WebP or AVIF instead of JPG.

Another mistake is repeatedly exporting the same photo through multiple lossy formats. Every JPG, WebP or AVIF export can introduce a small amount of loss. A better workflow is to keep the original, make edits once, and export the final delivery copy in the format required by the destination.

For SEO and website performance, conversion works best when paired with practical naming and dimensions. Use a descriptive filename, resize oversized camera photos before upload, and choose WebP for modern web pages when compatibility allows. The result is easier to manage, faster to load and still private because the processing happens in your browser.