Bulk Image Converter
Convert multiple images at once to JPG, PNG, or WebP.
Drop multiple images here
or click to browse · Up to 50 files
How to use Bulk Image Converter
Click the upload area or drag files
Click the blue 'Select Images' button in the center of the page, or drag and drop multiple image files directly onto the upload zone. You can select up to 50 images at once.
Choose your target format
Select your desired output format from the dropdown menu at the top right: JPG, PNG, or WebP. The preview panel on the right shows all selected files with their current formats.
Adjust quality and settings (optional)
Use the quality slider (0-100%) to adjust compression. For PNG, toggle the 'Remove background' checkbox if needed. For WebP, enable 'Lossless' mode for maximum quality.
Click Convert and download
Press the green 'Convert All' button at the bottom. Processing takes 5-30 seconds depending on file count and size. Click 'Download ZIP' to get all converted images in one file.
Related Tools
JPG to PNG Converter
Convert JPG images to PNG format instantly in your browser. No upload to server, 100% private and free.
PNG to JPG Converter
Convert PNG images to JPG format to reduce file size while maintaining good visual quality.
Image Compressor
Compress JPG, PNG and WebP images online without losing visible quality. Reduce file size up to 90%.
Bulk image converter: batch convert JPG, PNG, WebP, and HEIC free
Bulk image converter: batch convert JPG, PNG, WebP, and HEIC free
Select multiple images and ToolHQ's bulk image converter converts them all to your chosen format in one step. Your files never leave your device, conversion runs entirely in your browser.
Converting one image at a time works fine for occasional needs. When you have 40 product photos that all need to be WebP, or 100 HEIC files from an iPhone that need to be JPG for a web gallery, you need batch conversion. ToolHQ processes your entire selection at once and packages the results in a single ZIP download.
Key takeaways
- Converts JPG, PNG, WebP, and HEIC in any combination to any of those output formats
- All conversion happens in your browser, files never leave your device
- Download all converted files as a single ZIP
- Converting from a lossy format (JPG) to lossless (PNG) does not recover lost quality, artifacts remain
- Free with no account required
Image format comparison
Choosing the right output format depends on what the image contains and where you will use it.
| Format | Compression | Transparency | Best for | Avoid when |
|---|---|---|---|---|
| JPG | Lossy | No | Photos, complex images, web use | Images with text, sharp edges, transparency needed |
| PNG | Lossless | Yes | Screenshots, logos, graphics with text | Large photos (file size is large) |
| WebP | Lossy or lossless | Yes | Web images (smaller than JPG/PNG) | Older software that doesn't support it |
| HEIC | Lossy | No | iPhone/iPad photos (half the size of JPG) | Sharing with non-Apple or non-modern tools |
For web publishing, WebP consistently delivers the smallest file size at comparable quality, typically 25-35% smaller than JPG and 50% smaller than PNG at equivalent visual quality. The Wikipedia article on image file formats covers the technical history of each format, and the W3C PNG specification documents the lossless format standard.
The lossless/lossy conversion caveat
One point that catches people off guard: converting from a lossy format to a lossless format does not improve quality.
If you convert a JPG to PNG, the PNG is lossless going forward, no further quality loss from repeated saving. But the compression artifacts from the original JPG encoding are already baked into the pixel data. The PNG just stores those same pixels without further loss. The result is a larger file that looks identical to the JPG, not a better-quality image.
What this means practically:
- JPG to PNG: Good if you need transparency or plan to edit and re-save repeatedly. No quality gain.
- PNG to JPG: Smaller file, but introduces lossy compression. Fine for photos; visible artifacts on graphics with text or sharp edges.
- Anything to WebP: Recommended for web delivery. Smaller than JPG at the same quality level.
- HEIC to JPG or PNG: Essential for sharing Apple device photos with non-Apple software or older applications.
When to use bulk image conversion
E-commerce product photos: You receive a batch of HEIC images from a photographer's iPhone. Your platform requires JPG. Convert all at once instead of one by one.
Web optimization: Your site currently serves PNGs and JPGs. Switching to WebP reduces page load time. Bulk convert your entire image library and update image paths.
Photo library sharing: Sharing iPhone photos with Windows users, Android apps, or older tools that don't support HEIC requires conversion to JPG or PNG first.
Social media preparation: Different platforms prefer different formats. Bulk convert a batch of images to the right format before uploading.
Print and archival: Converting web images (JPG) to lossless PNG or TIFF preserves them from further compression loss in editing workflows.
Simone managed the product catalog for a small furniture company. They had 200 HEIC photos from their iPhone shoot that needed to be WebP for the website and JPG for their e-commerce platform supplier. She dragged all 200 into ToolHQ's bulk image converter, selected WebP as the output, downloaded the ZIP, then repeated with JPG for the supplier files. Both batches completed in her browser in under two minutes. No upload, no waiting for a server, no size limits from a free tier.
Convert multiple images at once, free at ToolHQ
How to use ToolHQ's bulk image converter
- Open the tool. Go to https://www.toolhq.app/tools/bulk-image-converter.
- Select or drop your images. Choose multiple files at once from your file picker, or drag and drop them. Mix formats freely, JPG, PNG, WebP, and HEIC can all be added together.
- Choose output format. Select the target format: JPG, PNG, WebP, or HEIC.
- Convert. Click Convert. Your browser processes each image locally.
- Download. All converted files are packaged into a ZIP. One click to download everything.
Your files never leave your device. No files are uploaded to any server. Conversion happens locally in your browser.
Format conversion use cases
JPG to PNG: Needed for images requiring transparency, or when you want a lossless master copy for further editing. PNG files will be larger than the source JPG.
PNG to WebP: Excellent for web delivery. WebP supports transparency like PNG but at significantly smaller file sizes. PNG to WebP as a single-file option.
JPG to WebP: Most common web optimization conversion. WebP at equivalent visual quality is typically 25-30% smaller than JPG. JPG to WebP handles single files.
HEIC to JPG: The standard conversion for sharing iPhone photos with non-Apple devices, older applications, or web platforms that don't support HEIC. HEIC to JPG as a single-file option.
HEIC to WebP: Converts iPhone photos directly to the web-optimized format, skipping JPG as an intermediate step. HEIC to WebP handles single files.
File size expectations after conversion
Conversion changes both format and file size. Here is what to expect:
| Conversion | Typical size change | Notes |
|---|---|---|
| JPG to PNG | 2-5x larger | PNG stores all pixels losslessly |
| PNG to JPG | 50-80% smaller | Lossy compression |
| JPG to WebP | 20-35% smaller | Same or better visual quality |
| PNG to WebP | 30-60% smaller | WebP matches PNG transparency |
| HEIC to JPG | Similar or larger | HEIC is already highly compressed |
| HEIC to WebP | Slightly smaller | Both are modern efficient formats |
These are approximate ranges. Actual results depend on image content. Photos with many colors and gradients compress well with lossy formats. Images with flat colors, text, and sharp edges benefit more from lossless.
After converting, if file sizes are still larger than needed, the image compressor reduces file size within the same format using quality adjustment.
David ran a travel blog with hundreds of JPG photos taken over three years. His page load scores were suffering. He used ToolHQ's bulk image converter to convert his entire photo library to WebP, then updated his WordPress image paths. His average image file size dropped from 280KB to 185KB. He used the image compressor on a few higher-resolution shots to bring those down further.
Frequently asked questions
How many images can I convert at once?
Conversion runs in your browser, so practical limits depend on your device memory. Most machines handle 50-200 images per batch without issue. For larger batches, convert in smaller groups.
Will converting JPG to PNG make my images higher quality?
No. Converting from a lossy format (JPG) to lossless (PNG) stops further quality loss but does not recover quality lost in the original JPG compression. The pixels stay the same.
Can I convert different formats in the same batch?
Yes. You can drop in a mix of JPG, PNG, WebP, and HEIC files and convert them all to one target format in a single operation.
Do my files get uploaded to a server?
No. ToolHQ's bulk image converter runs entirely in your browser. Your files never leave your device and are never sent to any server.
What is HEIC and why do I need to convert it?
HEIC (High Efficiency Image Container) is the default photo format on iPhones and iPads. It is highly compressed and modern, but not universally supported by older software, Windows, Android apps, or web platforms. Converting to JPG or PNG ensures compatibility.
The short version
ToolHQ's bulk image converter processes multiple images at once, converting between JPG, PNG, WebP, and HEIC formats. All conversion runs in your browser, your files never leave your device. Download all results as a single ZIP.
Remember: converting from JPG to PNG does not improve quality. It only stops further lossy compression. For web delivery, converting to WebP reduces file size without visible quality loss.
For single-file conversions, JPG to PNG, HEIC to JPG, and HEIC to WebP handle one image at a time. After conversion, the image compressor reduces file size further if needed.
Convert images in bulk, free and browser-only at ToolHQ