Image Format Converter

The image format converter changes a picture from one file type to another — PNG to JPEG, JPEG to WebP, WebP to PNG, and every other combination. It is a small task that comes up surprisingly often: a website refuses a WebP upload, a printer needs a JPEG, a design tool only accepts PNG, or you simply want a smaller file without editing anything by hand.

Drop an image into the converter, choose the output format, and the converted file is ready to download instantly. The tool shows the new file size and the change relative to the original, so you can see at a glance whether the conversion made the file smaller or larger before you save it.

What each format is good for

PNG is the format to choose when you need crisp edges and transparency — logos, icons, diagrams, and screenshots with text. It stores pixels losslessly, so nothing is degraded, but the files are larger, which makes it a poor choice for photographs.

JPEG is the classic format for photographs and continuous-tone images. It compresses aggressively by discarding detail the eye barely notices, producing small files. It does not support transparency, and converting a transparent PNG to JPEG will fill the transparent areas with white. Repeatedly saving as JPEG also slowly degrades quality, so convert once from the original rather than chaining conversions.

WebP is the modern default for the web. It matches or beats JPEG at the same visual quality while staying significantly smaller, and it supports transparency like PNG. Every current browser and most modern apps accept WebP, though some older software and a few legacy systems still do not.

How the conversion works

The tool decodes your image, redraws it onto an invisible canvas at its original dimensions, and re-encodes it in the format you picked. Because the redraw happens at full resolution, there is no downscaling or cropping — only the encoding changes. For lossy formats, a high quality setting is used so the conversion itself introduces minimal extra degradation.

There is one behavior worth knowing before you convert. Going from a lossless format (PNG) to a lossy one (JPEG or WebP) will always reduce quality by a predictable, usually imperceptible amount. Going the other direction — JPEG to PNG — does not recover the detail that JPEG already discarded; it simply stores the already-compressed pixels losslessly, so the file gets bigger without looking better. Convert from the best-quality original you have.

Typical situations

Designers convert screenshots to WebP to speed up a website, then keep PNG masters for editing. Photographers convert RAW exports to JPEG for email and social sharing. Developers convert icons to PNG for maximum compatibility. Students convert a WebP image downloaded from the web into a JPEG that will upload into an assignment portal. In every case the goal is the same: match the file to whatever the destination expects.

Privacy

The whole conversion runs in your browser with the Canvas API. Your image never leaves your device — nothing is uploaded, stored, or processed on a server. That makes the converter suitable for private photos, confidential documents, and unreleased work, and it means the tool is fast even on a slow connection.