Switch image formats without losing local control
JPEG, PNG and WebP each have trade-offs — JPEG suits photos, PNG keeps transparency, and WebP often gives the smallest file for web use. This converter switches between all three, either one image at a time or as a batch, with nothing uploaded.
How to convert an image
- Drop or select an image (or several, for batch mode).
- Pick the target format — JPEG, PNG, or WebP.
- For single-image conversion, adjust the quality slider if converting to JPEG or WebP.
- Click Convert and the file downloads immediately in the new format.
Choosing a format
- JPEG — best for photographs where small file size matters more than transparency.
- PNG — best when you need a transparent background or crisp edges on graphics/logos.
- WebP — typically the smallest file size at comparable quality, ideal for websites.
Why convert locally instead of using an upload-based site?
Many free image converters route your file through a remote server, which is unnecessary for a task the browser can do natively using the Canvas API. Processing locally means faster conversion (no upload/download round trip), no file-size caps tied to a server plan, and no copy of your image sitting on someone else's storage.
Will converting to JPEG lose transparency?
Yes — JPEG doesn't support transparency, so any transparent areas in a PNG will be filled in (typically with white) when converted.
Does batch convert support a quality setting too?
Batch convert uses a fixed high-quality setting for consistency across files. For precise control over a single image's quality, use the Single Convert option above it.
Does converting to WebP reduce image quality?
At the default quality setting, WebP typically looks visually identical to the source while producing a smaller file. Lowering the quality slider trades some detail for an even smaller file size.
Is there a limit to how many images I can batch convert?
There's no fixed server-side cap since everything runs in your browser — practical limits depend on your device's available memory when converting a very large batch at once.
Using this in a Central Government office
Conversion is nearly always driven by an upload form. Portals accept a specific set of formats and reject the rest, and the format your phone or scanner produced is frequently not on the list.
Where this comes up
- Portal uploads that accept only JPEG or PNG — photographs, certificates and signature images captured in another format.
- HEIC photographs from a phone, which most government portals will not accept at all.
- Converting to PNG for a transparent signature that can be placed on a document without a white box around it.
- Converting to WebP where the target accepts it and file size matters.
Choosing the format
JPEG is right for photographs and scanned pages and produces small files, but it loses a little quality each time it is re-saved — so convert from the original, not from a copy that has already been through JPEG twice. PNG is right for signatures, screenshots, and anything with sharp edges or transparency, at the cost of a larger file. If the portal states an accepted format, use exactly that one rather than assuming a close relative will pass.
Before you upload
Check the portal's stated size and dimension limits as well as its format list — a correctly converted file can still be rejected for being too large or the wrong pixel dimensions. Resize first, convert second.