Optimized
Batch Image Converter
Convert PNG, JPG, WebP and more — all at once, right in your browser. No uploads, no waiting.
Utility
Launch Tool
15+
Tools available
$0
Cost to use
None
Signup required
Zero
Data sent to server
Why ToolMars
Built differently from other tool sites
Your data never leaves your browser
Every tool processes your files and text locally. Nothing gets uploaded to a server — ever. This matters when you're working with client data, API keys, or private documents.
No account, no paywall, no limits
Every tool is free forever. There are no usage caps, no premium tiers, and no signup forms standing between you and the tool you need.
Built for real developer workflows
Tools like the redirect compiler, schema generator, and robots.txt builder are designed around tasks developers actually run into — not just generic utilities.
Privacy
Your files stay on your device.
Nothing gets uploaded
When you convert an image, format JSON, or calculate your mortgage, the processing happens inside your browser tab. There is no server receiving your data.
Works with sensitive files
Because nothing leaves your device, it's safe to use ToolMars with client files, internal documents, API keys, or anything you wouldn't normally paste into a random website.
No account means no data trail
We don't ask you to log in, so we never collect your email, usage history, or any personal information.