Most people arrive at a converter knowing the format they have and not the format they need, so: WebP is the right default for anything going on a website. It reaches comparable visible quality to JPEG in meaningfully fewer bytes, and unlike JPG it supports transparency, so a cut-out logo stays cut out. Browser support stopped being a concern some years ago.
PNG earns its place when you need lossless output or real transparency — screenshots, logos, line art, anything with sharp edges or text, and any image you intend to keep re-editing. The cost is size: a photograph as PNG is typically several times larger than the same image as JPG or WebP.
JPG is mostly a compatibility choice at this point. It is the format that every application, upload form, and print shop will accept, which is usually the actual reason to convert to it. Just remember it cannot hold transparency, so anything see-through in your source gets flattened to white.
Browser-side processing is not strictly better, and the last row is the honest cost of it. Here is the trade in full.
| Typical server-based tool | Fileraz | |
|---|---|---|
| Where your images are processed | Uploaded to the operator's servers | In your browser tab, on your own device |
| What the operator can see | The file contents, while processing and in any retention window | Nothing — the file is never transmitted |
| Usage limits | Commonly a daily cap or a size cap, with a paid tier above it | No cap, because your conversions cost us nothing to run |
| Account required | Often, for anything beyond the basics | Never — there is no public sign-up at all |
| Speed | Upload time, queue time, then download time | Starts immediately; bounded by your own hardware |
| Large or complex files | Handled well — server hardware does the heavy lifting | Bounded by your device memory, and may fail where a server would not |
Worth knowing before you start, rather than after.
