Image Converter
Convert between JPG, PNG and WebP with adjustable quality.
Convert
Private by design. Images are decoded and re-encoded with the Canvas API inside your browser. No file is ever uploaded — the tool works with your network disconnected.
Frequently asked questions
Should I use WebP or JPEG?
WebP for anything served on the web — it is typically 25–35% smaller at the same visual quality and supports transparency. JPEG only when you need compatibility with older software.
What happens to transparency when converting PNG to JPG?
JPEG has no alpha channel, so transparent pixels are filled with a background colour. Choose that colour before converting, or the default white will be used.
Does converting JPEG to PNG improve quality?
No. Compression artefacts already exist in the pixel data. PNG stores them losslessly in a larger file.
Is there a file size limit?
No hard limit is imposed, but very large images are constrained by browser memory and maximum Canvas size. Files up to about 20 MB convert comfortably on desktop.
About the Image Converter
Pick the format by what the image contains, not by habit.
WebP is the default choice for the web: 25–35% smaller than JPEG at equivalent quality, with transparency support, and available in every current browser. JPEG suits photographs where you need maximum compatibility with older software. PNG is lossless and belongs to screenshots, diagrams, logos and anything with sharp edges or transparency — saving a screenshot as JPEG produces visible ringing around text.
Converting PNG to JPEG flattens transparency, so pick the background colour that will replace it. Converting JPEG to PNG makes the file larger without restoring any quality, because the JPEG compression artefacts are already baked into the pixels.
The quality slider applies to JPEG and WebP only. The estimated output size updates as you move it, so you can find the point where the file gets small before the image gets ugly.