Image Converter Online

Convert images between JPEG, PNG, WebP, GIF, and BMP formats online — browser-based conversion with quality control, transparency handling, and no server upload required.

Why Use an Online Image Converter?

Format compatibility: Convert images to the format required by specific software, platforms, or services that accept only certain file types.
Web optimization: Convert photos from PNG or BMP to JPEG/WebP for dramatically smaller file sizes and faster web loading.
Transparency preservation: Convert between formats that support alpha channels (PNG, WebP) without losing transparent areas.
No software required: Convert directly in your browser without installing Photoshop, GIMP, or any other image editing software.
Workflow integration: Quick format conversion without disrupting your workflow — convert, download, and continue working.

Open Tool

How to Convert Image Formats

Upload source image: Supports JPEG, PNG, WebP, GIF, BMP, TIFF, ICO, and AVIF input — drag and drop or click to browse.
Select target format: Choose JPEG for photos (smallest file size), PNG for graphics with transparency (lossless), or WebP for modern web use (best compression with transparency support).
Configure format-specific settings: JPEG → quality 75–90%; PNG → compression level 1–9; WebP → quality 75–85% or lossless mode.
Handle transparency: Converting to JPEG from PNG/WebP — set background fill color. Converting to PNG/WebP from JPEG — transparency not applicable (original has none).
Download converted file: Preview shows output format, dimensions, and file size — download when satisfied with the result.

Real-World Use Case

A content creator maintains images in multiple formats for different platforms: original photography as JPEG (for Instagram and email), icons and logos as PNG (for transparency in web designs), hero images as WebP (for web performance), and animated content as GIF (for Twitter). Rather than maintaining separate files for each format, they convert from a master JPEG or PNG using the online converter for each destination format. When the company redesigns their website to use WebP for all images, the converter batch-processes 400 existing JPEG images to WebP in under 20 minutes — no additional software licenses needed.

Format Selection Guide

JPEG: Best for photographs, complex imagery, and email/print. Not for transparency. Supported everywhere. 60–80% compression typical.
PNG: Best for graphics with transparency, logos, screenshots, and text-heavy images. Lossless compression. Larger files than JPEG for photos.
WebP: Best for web delivery — 25–35% smaller than JPEG at same quality, supports transparency. Supported in all modern browsers (Chrome, Firefox, Edge, Safari 14+).
GIF: Only 256 colors — avoid for photos. Use for simple animations where MP4/WebP isn't supported.
BMP: Uncompressed — very large files. Only use when required by specific software (older Windows applications, some industrial tools).

Performance & Limits

Supported conversions: Any format to JPEG, PNG, or WebP — TIFF, BMP, ICO, AVIF inputs also accepted.
Maximum input size: Up to 50 MB per image for browser-based processing.
Conversion speed: Typical images convert in 1–3 seconds; large files (20+ MB) may take 5–10 seconds.
Color space: RGB color space is preserved during conversion; CMYK images are converted to RGB (web color model).
All processing in-browser: No server upload — conversion uses WebAssembly for near-native speed in the browser.

Common Mistakes to Avoid

Choosing wrong format for use case: Converting a photo to PNG for web use creates unnecessarily large files — JPEG or WebP is always better for photos.
Converting screenshots to JPEG: Screenshots with text and UI elements look blurry as JPEG — always keep screenshots as PNG.
Ignoring transparency when converting to JPEG: PNG or WebP images with transparent backgrounds need a fill color set before JPEG conversion — default black fill is often wrong.
Multi-generational conversion: Converting JPEG→PNG→JPEG compounds quality loss at each JPEG step — convert from the original source format only.
Not checking browser support for target format: AVIF has excellent compression but browser support below 90% — check caniuse.com for current support before deploying.

Privacy & Security

Zero server upload: All conversion processing runs in your browser using WebAssembly — images never leave your device.
No conversion logging: We don't track which formats you convert between or the content of your images.
Session-only access: Images in memory are cleared when you navigate away or close the tab.
Enterprise-safe: Convert confidential product images, internal documents, and proprietary graphics without external data exposure.

Frequently Asked Questions

What is the best image format for websites?

For modern websites in 2025, WebP is the recommended primary format: 25–35% smaller than JPEG at equivalent quality; supports transparency (like PNG); animated (can replace GIF); supported by 95%+ of browsers globally. Use JPEG as fallback for browsers that don't support WebP (less than 5% of traffic for most sites). Use PNG only when lossless quality and maximum software compatibility are both required (logos shared with external partners, archival files). AVIF offers even better compression than WebP (about 30–50% smaller than JPEG) but has lower browser support (around 80%) — use with WebP fallback for cutting-edge optimization. Avoid BMP and uncompressed TIFF for web delivery entirely.

Can I convert a GIF to PNG or JPEG?

Yes — GIF images can be converted to PNG or JPEG. Important considerations: GIF uses a maximum of 256 colors (8-bit color palette); converting to PNG produces a higher-quality lossless version that may appear better than the GIF (especially for gradients that show banding in GIF's limited palette); converting to JPEG eliminates the color limitation but loses the transparency support GIF provides. For animated GIFs: converting to PNG or JPEG extracts only the first frame (a static image); to preserve animation, convert to WebP (animated WebP) or MP4 video format instead. GIF-to-video conversion produces dramatically smaller file sizes — a 5 MB animated GIF often converts to under 200 KB as MP4.

How do I choose between lossy and lossless compression?

Choose lossy compression (JPEG, lossy WebP) when: file size is more important than perfect quality reproduction; the image is a photograph where subtle quality loss is imperceptible; the image won't be edited further after conversion; web performance is a priority. Choose lossless compression (PNG, lossless WebP, GIF for simple graphics) when: the image contains text, sharp geometric shapes, or line art where artifacts would be noticeable; the image will be used as a source for further editing; perfect pixel accuracy is required (technical diagrams, medical imaging, QR codes); the image has areas of flat color where lossless PNG compression is actually more efficient than JPEG for the same visual result.

Why does my converted image have different colors than the original?

Color differences after conversion are most commonly caused by color space mismatch. JPEG files often embed ICC color profiles (sRGB, AdobeRGB, Display P3) that define how colors should be interpreted. When converting between formats, if the color profile isn't preserved or interpreted correctly, colors may shift — particularly reds and oranges. Solution: ensure both source and output use sRGB color profile (the web standard). If working with professional photography in AdobeRGB or P3 wide-gamut color spaces, convert to sRGB first using a color-managed editor (Photoshop, GIMP, Affinity Photo) before using a format converter — this gives you control over the color space conversion rather than relying on the converter's default behavior.