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Convert Image
Switch between JPG, PNG, and WebP in one click. Works instantly in your browser.
1
Upload2
Process3
DoneDrag & drop files here
or click to browse from your computer
MAX SIZE: 20 MB
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Tablette graphique
Wacom Intuos Small
79€env.
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Convert your images between formats in one click.
Have a WebP but need a PNG? Or a JPG that needs to become a WebP? Zipero handles it instantly. Pick your file, choose the output format, and download — done in a few seconds.
We support JPG, PNG, and WebP, the most common formats on the web. No account or installation needed — everything works directly in your browser.
Conversion happens entirely on your device, so your images stay private. Nothing is ever sent to our servers.
How to convert an image format with Zipero
- 1Upload your source image by dragging it into the tool or clicking to browse. JPG, PNG, and WebP are all accepted as inputs.
- 2Select the target format you need from the dropdown menu — JPG for universal compatibility, PNG for lossless quality and transparency support, or WebP for the best file size on modern web projects.
- 3Click Convert and download your converted image. The entire operation takes under two seconds and never leaves your browser.
When do you need to change image formats?
- ▸Converting to WebP for websites: WebP files are 25–35% smaller than equivalent JPGs at the same visual quality. Most modern web frameworks and CMS platforms expect WebP for fast-loading, performance-optimised pages and good Core Web Vitals scores.
- ▸Converting from WebP to JPG for compatibility: WebP is not universally supported by all email clients, legacy browsers, or older printing and document-editing software. Converting to JPG ensures the image opens correctly in every context.
- ▸Converting to PNG for transparent backgrounds: PNG supports full alpha-channel transparency; JPG does not. If you need a logo, icon, or graphic that sits cleanly on any coloured background, you need a PNG — convert here in one step.
How image formats work — JPEG, PNG and WebP explained
Image formats rely on two fundamentally different strategies: lossy compression and lossless compression. JPEG is lossy: it throws away visual information the human eye struggles to perceive. It divides the image into 8×8-pixel blocks, applies a DCT (Discrete Cosine Transform), and quantises high-frequency components — meaning it reduces the precision of fine details. The result is a significantly smaller file, but block artefacts appear at very low quality settings.
PNG is lossless: every pixel is preserved exactly. It applies a prediction-filter preprocessing step (each pixel is encoded relative to its neighbours), then compresses the output via DEFLATE — the same algorithm as ZIP. This preserves total pixel accuracy and supports transparency via alpha channel, but produces larger files on photographs because of the complexity of natural colour gradients.
WebP is a hybrid format developed by Google: it offers a lossy mode based on neighbour-block prediction (more efficient than JPEG's DCT) and an alternative lossless mode. In lossy mode, WebP produces files 25–35% smaller than an equivalent-quality JPEG. It also supports transparency in lossy mode — an advantage neither JPEG format can offer. Choosing the right format depends on content: photographs → JPEG or WebP; logos and graphics → PNG or lossless WebP.
Frequently asked questions about image format conversion
Does converting between formats reduce image quality?
Converting from one lossy format to another (for example WebP to JPG) involves one re-encoding step. At standard quality settings the difference is negligible and invisible at normal viewing distances. Converting to PNG — a lossless format — from any source introduces absolutely no quality loss.
Why is my converted PNG file larger than the original JPG?
PNG is a lossless format that stores every pixel exactly as-is, which produces larger files than the lossy compression used by JPG or WebP. If keeping file size small is a priority, stay with JPG or convert to WebP instead of PNG.
Can I convert animated GIFs or other animated formats?
The image converter handles still images. For video and animation conversion — including creating GIFs from video clips — use Zipero's dedicated Video Converter tool, which is available on the Premium plan.
Related articles
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DPI and resolution are frequently confused. Here's what each term actually means and when it matters.
Tablette graphique
Wacom Intuos Small
79€env.
View on Amazon
Amazon affiliate link — supports Zipero for free. Go Premium to remove.