Free Image Converter
Convert between JPG, PNG, WebP and BMP instantly. Batch convert up to 20 images with quality and background control — all in your browser, nothing uploaded.
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Drop images in the left panel to get startedWhat Is Image Conversion?
Image conversion means changing a picture from one file format to another — for example, converting a PNG screenshot to JPEG to make it smaller, or converting a JPEG photo to WebP to speed up a website. The image content stays the same; only the encoding changes.
Different formats are optimized for different things. Choosing the right one can mean the difference between a 500 KB and a 100 KB file — same visual quality, five times the weight.
The four formats this tool supports
| Format | Type | Transparency | Best for |
|---|---|---|---|
| JPEG | Lossy | No | Photographs, email attachments, universal compatibility |
| PNG | Lossless | Yes | Screenshots, logos, graphics with text or sharp edges |
| WebP | Lossy or lossless | Yes | Modern websites, best size/quality ratio |
| BMP | Uncompressed | No | Legacy Windows apps, print pipelines, raw bitmaps |
Choosing the right format
For photographs → JPEG or WebP
Photographs contain smooth gradients and millions of colours. JPEG is designed exactly for this — it uses lossy compression to produce small files with barely noticeable quality loss. WebP does the same thing 25–35% more efficiently and is supported by 97%+ of browsers. If you're optimizing for the web, WebP is the better choice.
For screenshots, logos and text → PNG or WebP
These images have sharp edges, flat colours and often text. JPEG compression creates ugly "blocky" artifacts around text and hard edges, making it a bad fit. PNG preserves every pixel exactly and supports transparency. Use PNG when you need guaranteed quality; WebP if you need smaller files.
For very small images (icons) → PNG or WebP
Icons benefit from transparency and sharp edges. For favicons and small UI elements, PNG at reasonable size or WebP is ideal.
When you need BMP
BMP is essentially a raw pixel dump — huge files, no compression, no transparency. It's rarely a good choice for the web. Use BMP only when a specific legacy app or print workflow requires it.
Common conversion pitfalls
1. Converting PNG with transparency to JPEG
JPEG doesn't support transparency. The transparent areas get filled with a colour — usually black or white. If your PNG has a transparent logo, use PNG or WebP instead. Or use this tool's background colour picker to control the fill.
2. Converting JPEG to PNG won't restore quality
If a JPEG has already lost detail to compression, converting it to PNG preserves that lost detail — it doesn't bring it back. PNG's advantage is that it doesn't lose more quality on re-saves.
3. PNG screenshots can be huge
A full-screen PNG screenshot at 4K can easily be 8 MB. Converting to WebP with quality 85% typically produces a 400 KB file with no visible difference. If you're sharing screenshots, WebP is dramatically better.
4. GIF animation loss
Converting an animated GIF to JPEG, PNG, WebP or BMP captures only the first frame. Animation is lost. If you need animation, stay in GIF or use animated WebP (which this tool doesn't produce).
Format reference: what to use when
| Scenario | Recommended format | Why |
|---|---|---|
| Website hero photo | WebP (or JPEG) | Best size/quality; universal JPEG fallback |
| Product photo on e-commerce | WebP | Faster loading, better conversion rates |
| Company logo with transparency | PNG or WebP | Preserves transparency |
| Screenshot for email | JPEG | Smaller file, universally supported |
| UI icon in an app | PNG | Sharp edges, transparency |
| Photograph for print | JPEG (quality 95+) | Universal, high quality |
| Old Windows app input | BMP | Raw format required by legacy systems |
| Instagram/Facebook upload | JPEG | Platforms compress anyway; JPEG is standard |
Common use cases
Website Optimisation
Convert JPGs to WebP for 25–35% smaller files without quality loss.
Email Attachments
Convert PNG screenshots to JPEG to fit under size limits.
Logo Preparation
Convert JPEG logos to PNG for clean edges and transparency.
Print Preparation
Convert to JPEG at high quality for print shops that require it.
App Compatibility
Convert to PNG for apps that require lossless image input.
Cloud Storage
Convert large PNGs to WebP to reduce your storage footprint.
Format Standards
Match a specific format required by a platform or client.
Web Development
Produce multiple formats for `<picture>` element fallbacks.
Privacy and security
This image converter runs entirely in your browser using the Canvas API. Your images are never uploaded, never stored, and never transmitted to any server. The processing happens on your device, which means the tool works offline once the page has loaded. Safe for private photos, client work and confidential material.