Popular online tools
Select a tool to start immediately. Fast local processing with no file size limits or wait times.
Image Format Converter
Convert images between JPG, PNG, WebP, AVIF, BMP, and ICO formats instantly. 100% free with local browser privacy.
Crop Image
Crop JPG, PNG, and WebP images with freeform box or locked aspect ratio blocks (1:1, 16:9, 4:3). 100% in-browser processing.
Image Resizer
Resize JPG, PNG, WebP, and SVG images by pixel dimensions or percentages without quality loss. 100% in-browser processing.
Image Compressor
Compress JPEG, PNG, and WebP files to drastically reduce file sizes while maintaining crystal-clear visual quality.
Why use Velenstac?
Every tool is designed for speed, privacy, and practical daily utility.
Client-side privacy
Files are processed directly inside your browser. Nothing is ever sent to or stored on external servers.
No upload latency
Processing runs instantly on your device without waiting for multi-megabyte transfers over the internet.
Completely free
Every tool is freely accessible with no subscription plans, hidden fees, or artificial usage caps.
No sign-up needed
Open any tool and begin immediately. We never ask for account registration or personal details.
How it works
Three straightforward steps to edit, convert, or compress your files.
Select your file
Drag and drop your file into the tool or browse from your device. Files stay in local browser memory.
Adjust settings
Choose dimensions, target quality, or output formats with real-time feedback and control.
Save output
Save your processed file directly to your device with no waiting time or server delay.
Frequently asked questions
Common questions regarding privacy, performance, and file handling.
Are my files uploaded to your servers?
No. All file processing happens entirely on your computer inside your web browser using HTML5 Canvas, WebAssembly, and local JavaScript APIs. Your files never travel across the internet.
Is Velenstac really free?
Yes. All utilities are completely free to use with no subscription plans, hidden fees, or artificial daily limits.
Do I need to create an account or sign in?
No registration is required. You can start using any tool instantly without providing an email address or creating an account.
What image formats are supported?
Our image tools support JPEG, PNG, WebP, and SVG files. Additional formats and converters are added regularly.
Are there file size limits?
Because processing uses your local device memory rather than remote servers, you can process standard files quickly without remote queue limits.