Free Online Image Converter
Convert images between JPG, PNG, and WebP formats in your browser with batch support. The selected file contents are not sent to ToolkitFree for conversion.
Drag and drop files here
or
Accepted input: JPG, PNG, or WebP
How to Convert Images
- Upload one or more images by dragging & dropping or clicking to browse
- Select your desired output format (JPG, PNG, or WebP)
- Open Fine-tune to adjust quality for JPG or WebP output
- Download files individually, or all at once as a ZIP
Features
- Convert between JPG, PNG, and WebP
- Batch convert multiple images with one ZIP download
- Adjustable quality for JPG and WebP
- Local conversion — selected images are not uploaded for processing
- Capacity depends on browser memory and Canvas limits
- Free with no watermarks
Practical limits
Browser processing safeguards
These are ToolkitFree screening thresholds, not promises that every browser can reach them.
| Safeguard | Desktop | Mobile |
|---|---|---|
| Single-image hard cap | 100 MP | 100 MP; the 80 MP total cap can block first |
| Batch size warning | 20 files | 10 files |
| Batch size block | 50 files | 25 files |
| Encoded input warning | 100 MiB | 40 MiB |
| Encoded input block | 250 MiB | 100 MiB |
| Total pixels warning | 80 MP | 32 MP |
| Total pixels block | 200 MP | 80 MP |
| Working memory warning | 512 MiB | 192 MiB |
| Working memory block | 1 GiB | 384 MiB |
| Parallel processing | Up to 2 images | Up to 2 images |
Large dimensions can exhaust browser memory before encoded file size looks large. ToolkitFree checks dimensions and estimated working memory before processing.
Frequently Asked Questions
How does the image converter work?
Our image converter uses the Canvas API in your browser. When you choose an image, it is loaded into a hidden canvas element and re-exported in your chosen format without sending the selected file content to ToolkitFree for conversion.
What image formats are supported?
We support JPG/JPEG, PNG, and WebP formats for both input and output. You can convert between any of these formats. More formats like AVIF and HEIC may be added in future updates.
Is there a file size limit?
There is no server upload limit, but browser memory and Canvas dimension limits still apply. Large images or batches can be slow or fail, especially on mobile devices.
Can I convert multiple images at once?
Yes. You can select multiple images and convert them in one browser session. Processing time depends on the number of files, image dimensions, device memory, and browser limits.
How do I download a converted batch?
Each successful result has its own download link. You can also choose Download all as ZIP to create one archive in your browser. Failed files are listed with their reason and are not added to the ZIP.
Will I lose image quality when converting?
PNG output uses lossless encoding for the decoded pixels, but conversion cannot restore detail already lost in the source. JPG and WebP are re-encoded and may lose quality; use the slider to control the tradeoff.
Is this tool free?
Yes, the tool is free to use and requires no ToolkitFree account. Browser memory, image dimensions, and device-aware batch safeguards still apply.
Do you keep a copy of my images?
No image is uploaded to ToolkitFree for conversion or stored by ToolkitFree as a processed file. Conversion uses temporary browser memory and object URLs, while the page still loads normal site resources.
Can I use this on my phone?
The converter is designed for modern mobile browsers as well as desktop browsers. Large images or batches may reach mobile memory and Canvas limits sooner.
What is WebP and why should I use it?
WebP is a modern image format that supports lossy and lossless compression plus transparency. Output size varies by image content, dimensions, format, and quality, so compare the actual result before downloading.
How do I convert JPG to PNG?
Upload your JPG file and choose PNG in the Convert to row. There is no submit step: the tool decodes the JPG and exports its pixels as PNG as soon as the format is set. PNG output avoids further lossy encoding, but it cannot restore detail already lost to JPG compression.
How do I convert PNG to JPG?
Upload your PNG file and choose JPG in the Convert to row; the conversion runs without a submit step. Note that JPG does not support transparency — transparent areas will be filled with white. The quality slider is under Fine-tune, and the result follows it.
How do I convert images to WebP?
Upload any image file (JPG, PNG, etc.) and choose WebP in the Convert to row. The conversion runs on its own, and changing the quality level under Fine-tune re-runs it. Output size varies by image content, so compare the actual result before downloading.
How do I change a picture from JPG to PNG?
Drag your JPG file onto the converter and choose PNG in the Convert to row. The result appears without a submit step. Your PNG will use lossless encoding for the decoded pixels, while existing JPG artifacts remain.
What can ToolkitFree's image converter do?
ToolkitFree's image converter supports JPG, PNG, and WebP, with batch conversion and adjustable quality. Selected image content is processed in your browser and is not sent to ToolkitFree for conversion. No account is required and the tool adds no watermark.
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