Image Tools
Image Format Converter — Batch Convert JPEG, PNG, WebP & More
Convert images free between JPEG, PNG, WebP, GIF, BMP, TIFF, SVG, ICO, AVIF & HEIC in your browser. Batch upload, quality slider — start converting now.
Image Format Converter on FYN Tools is a free Image Tools utility. Open Image Format Converter in your browser — no signup required. Upload one or more images, pick an output format from JPEG, PNG, WebP, GIF, BMP, TIFF, SVG, ICO, AVIF, or HEIC, adjust the quality slider for lossy formats, and download converted files — AVIF falls back to WebP and HEIC to JPEG when the browser cannot encode them natively. Related: Image Compressor.
Privacy & processing: 100% client-side browser processing — images are drawn onto an HTML canvas and re-encoded locally. Canvas export does not preserve EXIF metadata in practice, even though Preserve Metadata and Optimize for Web checkboxes appear in the UI.
TL;DR: Upload one or more images, pick an output format from JPEG, PNG, WebP, GIF, BMP, TIFF, SVG, ICO, AVIF, or HEIC, adjust the quality slider for lossy formats, and download converted files — AVIF falls back to WebP and HEIC to JPEG when the browser cannot encode them natively.
Reviewed by FYN Tools Editorial · Guides ·
Data input / output
| Inputs | One or more image files in common raster or vector formats, plus an output format and optional quality setting |
|---|---|
| Outputs | Converted image file(s) in the selected output format, downloadable individually or as a batch |
| Formats | Input: JPG, PNG, WebP, GIF, BMP, TIFF, SVG, ICO, AVIF, HEIC; Output: same list; AVIF → WebP fallback, HEIC → JPEG fallback when unsupported |
| Limits | Quality slider applies only to lossy formats (JPEG, WebP, AVIF, HEIC); Preserve Metadata and Optimize for Web toggles are visible but not wired into the conversion logic |
| Processing | Client-side (browser canvas rendering) |
How to Use the Image Format Converter
- Drag and drop one or more images into the upload area, or click to select files.
- Choose an output format from the dropdown (JPEG, PNG, WebP, GIF, BMP, TIFF, SVG, ICO, AVIF, or HEIC).
- If the format is lossy, adjust the Quality slider (shown only for lossy targets).
- Optionally note the Preserve Metadata and Optimize for Web checkboxes — they do not currently affect output.
- Click Convert to process all selected images.
- Download each converted file from the results list.
What is an Image Format Converter?
This converter accepts batch uploads and lets you pick an output format from JPEG, PNG, WebP, GIF, BMP, TIFF, SVG, ICO, AVIF, and HEIC. For lossy targets (JPEG, WebP, AVIF, HEIC), a quality slider controls the compression level passed to canvas.toBlob. Raster images are drawn onto a canvas at their original dimensions with high-quality image smoothing enabled, then exported in the chosen MIME type.
Two important honesty notes: AVIF output falls back to WebP when the browser cannot encode AVIF natively, and HEIC falls back to JPEG for the same reason — a toast message tells you which format was actually produced. The Preserve Metadata and Optimize for Web checkboxes are displayed in the UI but are not connected to the conversion function; because canvas re-encoding strips EXIF data in practice, metadata from the original file is not carried through.
Each uploaded file is loaded into an Image object, drawn onto an offscreen canvas, and exported via canvas.toBlob at the selected quality for lossy formats or at maximum quality for lossless ones. SVG inputs follow a separate path appropriate to vector content. Multiple files can be converted in one run, with per-file previews and individual downloads.
How it works
You set image file upload (png/jpg/webp as supported) + on-screen settings in the live panel. Image Format Converter then convert images between JPG, PNG, WebP formats with quality control. Fast and secure online image converter. Results show as processed image preview + download.
To reduce file size further, use our Image Compressor.
Usage scenarios
- Batch PNG-to-JPEG for web publishing: Upload a folder of PNG screenshots, set output to JPEG at 85% quality, and download smaller files ready for a blog or docs site.
- iPhone HEIC to JPEG conversion: Convert HEIC photos to JPEG when a destination only accepts JPG — the tool uses a JPEG fallback if native HEIC encoding is unavailable.
- Modern format experimentation: Try AVIF or WebP output on a test image and compare file sizes, knowing AVIF will fall back to WebP in unsupported browsers.
Input / Output Examples
Input
screenshot.png (1.2 MB)
Output
screenshot.webp (380 KB) — converted to WebP at 85% quality
Frequently Asked Questions
Which image formats are supported for conversion?+
We support 15+ formats including JPEG, PNG, WebP, GIF, BMP, TIFF, SVG, ICO, AVIF, HEIC, and more. Both input and output formats are fully supported with perfect quality preservation.
Can I convert multiple images at once?+
Yes! Our batch conversion feature allows you to upload and convert multiple images simultaneously. All converted images can be downloaded individually or as a ZIP archive for convenience.
Will the conversion affect image quality?+
For lossless formats like PNG, BMP, and TIFF, quality is perfectly preserved. For lossy formats like JPEG and WebP, you can adjust quality settings to balance file size and image quality according to your needs.
Why should I convert to WebP format?+
WebP provides 25-35% better compression than JPEG while maintaining high quality. It supports both lossy and lossless compression, transparency, and animation, making it ideal for modern web applications.
What's the difference between lossy and lossless conversion?+
Lossless conversion (PNG, BMP, TIFF) preserves every pixel exactly as the original. Lossy conversion (JPEG, WebP) uses compression to reduce file size while maintaining visual quality - you can control the quality level.
Can I convert SVG files?+
Yes! SVG (Scalable Vector Graphics) files can be converted to raster formats like PNG, JPEG, or WebP. The vector graphics will be rendered at your specified resolution for optimal quality.
Is there a file size limit?+
No, there are no file size limits. Our converter processes images client-side, so you can convert images of any size without restrictions.
How does batch conversion work?+
Upload multiple images, select your target format, and our converter will process all images simultaneously. You can download them individually or as a single ZIP file for convenience.
Can I preserve image metadata during conversion?+
Yes, our converter can preserve EXIF data, color profiles, and other metadata when converting between compatible formats, ensuring your images retain their professional properties.
Which format is best for web use?+
WebP is ideal for modern web use due to superior compression. For broader compatibility, JPEG works well for photos, while PNG is perfect for graphics with transparency.
Key Features
- Batch file upload and conversion
- 10 output formats: JPEG, PNG, WebP, GIF, BMP, TIFF, SVG, ICO, AVIF, HEIC
- Quality slider for lossy formats
- Per-file preview and download
- AVIF→WebP and HEIC→JPEG browser fallbacks
Benefits
Convert a whole set of images without opening a desktop editor.
Get web-ready JPEG or WebP from phone HEIC shots instantly.
Keep files local — nothing uploads to a server.
When to Use Image Format Converter
- Converting a batch of PNG screenshots to JPEG for smaller email attachments
- Switching product photos from HEIC (iPhone) to JPEG for a website that does not accept HEIC
- Generating WebP versions of JPEG assets for faster page loads
- Converting between formats before uploading to a platform with strict file-type rules
Advantages
- Batch conversion of multiple images in one session
- Wide format support including AVIF, HEIC, SVG, and ICO
- Quality slider for lossy output formats
- Honest fallback messaging when AVIF or HEIC cannot be encoded natively
Tips
- Watch the toast after conversion — it tells you if AVIF was saved as WebP or HEIC as JPEG due to browser limitations.
- Use the quality slider for JPEG and WebP when file size matters; leave it high for archival conversions.
- Do not rely on Preserve Metadata for EXIF preservation — canvas export strips EXIF in practice.
- Convert to WebP when your CMS supports it for typically smaller files than equivalent JPEG.
Common Mistakes
Checking Preserve Metadata and expecting GPS or camera EXIF to survive — canvas re-encoding removes it.
Selecting AVIF and not noticing the WebP fallback in the success message.
Assuming Optimize for Web changes output — the checkbox is not wired into the conversion logic.
Summary
Upload your images, pick a target format, set quality for lossy outputs, and download converted files instantly — with clear fallback notices when AVIF or HEIC encoding is not available in your browser.