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All Image Conversion Tools
Pick any format pair below for a dedicated converter — or use the universal converter above.
Popular Conversions
Web Format Conversions
Legacy Format Conversions
Mobile Format Conversions
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How image conversion works
FileKit converts your images entirely in the browser using the Canvas API — no files are ever sent to a server. Simply drop one or more images, choose your target format, adjust quality if needed, and download. WebP and AVIF typically produce 25–50% smaller files than JPG at equivalent visual quality, making them ideal for web use.
Understanding Image Format Conversion
What Is Image Format Conversion?
Image format conversion changes an image from one file type to another — for example, from PNG to JPEG, or from HEIC to JPG. Different formats use different compression algorithms and support different features. JPEG uses lossy compression ideal for photos. PNG supports lossless compression and transparency. WebP offers superior compression for web use. Converting between formats lets you optimize images for their intended use case.
When Do You Need Image Conversion?
- Web optimization — convert PNG screenshots to JPEG or WebP for 50–80% smaller files with no visible quality loss on photographs.
- Compatibility — HEIC images from iPhones may not open on older Windows systems. Convert to JPG for universal compatibility.
- Transparency needs — convert JPEG to PNG when you need a transparent background for logos or overlays.
- Print requirements — some print shops require specific formats (TIFF, PDF). Convert your images to meet their specifications.
- Social media upload — some platforms accept only specific formats. Convert before uploading to avoid rejection.
Key Aspects of Image Conversion
- Format flexibility — convert between JPEG, PNG, WebP, BMP, TIFF, and HEIC in any direction.
- Quality preservation — lossless conversion for PNG, BMP, and TIFF. Adjustable quality slider for JPEG and WebP output.
- Batch conversion — convert dozens of images to the same format in one operation.
- Metadata handling — EXIF data (camera info, GPS, timestamps) is preserved during conversion unless you choose to strip it.
- Transparency support — PNG output retains alpha channel transparency. JPEG output fills transparent areas with white.
Tips for Image Conversion
JPEG for photos, PNG for graphics
Photos with complex gradients and colors compress much better as JPEG. Images with sharp text, logos, or transparency should remain PNG.
WebP is the web standard
WebP offers 25–35% better compression than JPEG at equivalent quality. If your target is web publishing and you do not need legacy browser support, WebP is the best choice.
Batch convert for consistency
When converting a set of images, use the same quality setting for all files. Inconsistent quality across a gallery looks unprofessional.
Watch out for HEIC
iPhone photos in HEIC format may look different after conversion if the color profile is not handled correctly. Always preview the result before batch converting.
Keep originals
Store your original images separately. Conversion is often a one-way street — you cannot perfectly recover a PNG from a JPEG.
Image Conversion: How It Compares
Converting image formats can be done through desktop software, command-line tools, or online services. Here is how browser-based conversion compares.
| Feature | FileKit | Desktop / Other |
|---|---|---|
| Privacy | Images processed locally in browser | Upload to online converters |
| Setup | No software installation needed | Desktop tools require installation |
| Format range | JPEG, PNG, WebP, BMP, TIFF, HEIC | Varies, some tools limited |
| Batch support | Convert unlimited files at once | Free tiers often cap at 5–10 |
| Quality control | Adjustable quality slider per format | Often fixed settings |
| Speed | Depends on file count and size | Server-side may be faster for huge batches |
How to Convert Image Formats
- 1
Upload your images
Drag and drop images in any common format — JPG, PNG, WebP, AVIF, GIF, or BMP.
- 2
Choose the target format
Select the output format you need. For web use, WebP offers the best size-to-quality ratio. For universal compatibility, choose JPG or PNG.
- 3
Convert and download
FileKit converts each image using the browser's built-in Canvas API. Download the converted files — quality settings are available for lossy formats.
Frequently Asked Questions
Your Privacy, Guaranteed
FileKit processes every file directly in your browser using JavaScript and WebAssembly. Your documents, images, and data never leave your device — there is no server upload, no cloud storage, and no account required. What happens in your browser stays in your browser.
- 100% client-side processing
- No server upload — ever
- No account or signup needed
- Works offline after first load