cnvrt.tools Help Guide

Welcome to cnvrt.tools! This guide will help you understand how to use all features of our browser-based media conversion tool.

Quick Start

To convert files:

1. Drag and drop your file(s) onto the conversion area, or click to select file(s).
2. This instantly converts your file(s) per the settings for each format.
3. The file(s) will be downloaded automatically once processing is complete.

Note: Mixed file types are supported in batches. It will convert all files in the batch to the selected format for each file type.

To use Droplet mode:

1. Create a URL with the format: https://cnvrt.tools/[format]-[parameters] or copy the URL from the settings menu,
2. Opening this link creates a droplet for this specific conversion.
3. You can use the URL parameters to create shortcuts for common conversions.

Supported Formats

Note on other formats: This tool leverages FFmpeg, which can understand a vast number of additional image, video, and audio formats beyond those explicitly listed. We'll attempt to process these files, and if successful, they will convert as expected. If a file format is not supported by the FFmpeg build or the specific conversion path, you'll receive a notification.

Conversion Settings

Droplet Mode

Droplet mode allows you to create conversion shortcuts using URL parameters. Perfect for automation and bookmarking common conversions.

URL Format

https://cnvrt.tools/[format]-[parameters]

Parameters

Parameter	Description	Example
h[number]	Height in pixels	h720
w[number]	Width in pixels	w1280
q[number]	Quality (1-100) (images only)	q80
b[number]	Bitrate in Mbps (lossy audio only)	b5
rm[method]	Resize method (images only)	rmlanczos

Examples

Important Considerations & Limitations

cnvrt.tools leverages the power of FFmpeg compiled to WebAssembly (WASM) to perform conversions directly in your browser. While this offers great privacy and speed for many tasks, there are some inherent limitations to be aware of:

• File Size: WebAssembly has a theoretical memory limit (often around 2GB) for file operations. However, practical limits within web browsers are often much lower, especially on mobile devices or browsers with stricter memory management (e.g., Safari on iOS). Files exceeding a few hundred megabytes (MB) may struggle or cause the browser to become unresponsive. For very large files (approaching 1GB or more), successful conversion is less likely.
• Video Complexity (Resolution & Frame Rate): Converting high-resolution videos (e.g., 4K) or videos with high frame rates (e.g., 60fps) is very resource-intensive. These operations require significant CPU power and memory. While FFmpeg.wasm can handle them, you may experience long conversion times or browser instability on less powerful devices.
• Performance Variability: Conversion speed and the ability to handle large/complex files can vary significantly based on your device's hardware (CPU, RAM) and the web browser you are using. Modern desktop browsers generally offer better performance.
• Output Limits: Similar to input files, there can be limitations on the size of the output file that can be generated and handled effectively by the browser.

If you encounter issues, such as very slow conversions or browser errors, consider:

• Using smaller input files.
• Choosing lower quality settings, smaller dimensions, or lower frame rates for video.
• Ensuring your browser is up to date.

Tips & Troubleshooting

• All processing happens in your browser - no files are uploaded to any server
• Larger files may take longer to process, especially on slower devices
• If conversion fails, try reducing quality settings or file size
• For best performance, use a modern browser with WebAssembly support
• Clear your browser cache if you experience any issues