Image Format Converter
Convert an image between JPG, PNG and WebP in your browser — with a quality slider for JPG and WebP — and download the converted file with before and after sizes. Free, no signup, your image never leaves your device.
Notes: conversion is canvas-based. JPG output loses transparency — converting a transparent PNG to JPG fills transparent areas, so check before you replace the original. GIF animation is lost (only the first frame survives), and AVIF output is excluded in this version because browser support varies. Very large images may slow the browser.
What Is the Image Format Converter?
A free image format converter is a tool that changes an image from one file format to another — JPG to PNG, PNG to WebP, WebP to JPG, and similar conversions — without uploading anything. Choose the image, pick the target format and quality, and the tool re-encodes it in your browser and reports the before and after size and format. If you need an image format converter for a WebP migration or a transparency fix, this page converts locally.
What Is It Used For?
Site owners use it to migrate photos to WebP for smaller files. Designers use it to turn a JPG into a PNG when transparency is needed later. Bloggers use it to convert screenshots for upload systems that accept only one format. Developers use it to prepare assets in the format a platform demands.
Key Benefits
- No uploads, fully private — conversion happens in your browser and the image never leaves your device.
- JPG, PNG and WebP output — the three formats the web actually uses.
- Quality control — a slider for JPG and WebP so you choose the size-versus-detail trade-off.
- Before and after sizes — see exactly what the conversion saved or cost.
- Preview before download — check the converted image before you save it.
- Completely free — no signup, no limits.
How to Use This Free Image Format Converter
- Choose an image file.
- Pick the target format: JPG, PNG or WebP.
- Set the quality slider if you chose JPG or WebP (it has no effect on PNG, which is lossless).
- Click Convert. The converted image, its sizes and a download link appear below.
- Check the preview — especially for transparency — then download and use the converted file.
Common Mistakes to Avoid With Image Format Conversion
- Converting a transparent PNG to JPG. JPG has no transparency, so see-through areas become solid. Keep transparency in PNG or WebP.
- Converting a JPG to PNG to "improve" it. A JPG converted to PNG only gets bigger — lost detail never comes back. Convert for compatibility, not for quality.
- Converting animated GIFs and expecting motion. Canvas output is a single frame, so animation is lost. Convert stills only.
- Overwriting the only original. Keep the source file. Conversion is one-way for quality and transparency.
- Assuming WebP works everywhere. Modern browsers support WebP, but very old systems may not — keep a JPG fallback for critical images if your audience includes them.
Frequently Asked Questions
Is this image format converter free? Yes, completely free — no signup, no limits, no account.
Is my image uploaded anywhere? No. Conversion happens entirely in your browser via canvas, so your image never leaves your device.
Which conversions are supported? Input in any format your browser can decode (JPG, PNG, WebP, GIF, BMP in most browsers); output in JPG, PNG or WebP.
Why does JPG output lose transparency? Because the JPG format has no alpha channel. Transparent pixels must be filled with a solid color when saving as JPG.
What happens to GIF animation? It is lost — canvas draws a single frame, so the converted file is a still image. Do not convert animated GIFs here if you need the motion.
Why is AVIF output excluded? Because browser support for encoding AVIF varies, and a converter that fails silently on some browsers would be worse than one that states its limits. JPG, PNG and WebP cover the reliable ground.
Does converting JPG to PNG improve quality? No. PNG is lossless, but it can only preserve the detail already in the JPG — it cannot restore what JPG compression removed. The file usually just gets bigger.
Why is WebP usually smaller than JPG? Because WebP's compression is more efficient for the same visible quality, especially for graphics and photos with flat areas. Savings vary by image.
Does the quality slider affect PNG? No. PNG is lossless, so quality settings do not apply to it. The slider matters for JPG and WebP only.
Will the converted image keep its dimensions? Yes. Conversion changes the format, not the pixel size — use the Image Resizer if you also need new dimensions.
What if my browser cannot decode the input? The tool reports that it could not read the image. Try converting the file to a common format first, or use a desktop editor for exotic formats.
Does it work on mobile? Yes, in any modern mobile browser, though very large images convert faster on a desktop.
Does converting formats help SEO? Indirectly: smaller files (usually WebP) load faster, and speed matters for visitors and search. The format name itself does not rank a page.
Final Thoughts
Format conversion is a small job that unblocks big ones — a WebP migration, an upload rule, a transparency fix. Convert here, check the preview, and keep your original safe.