String Utility Belt vs Responsive Tool
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
String Utility Belt compared with Responsive Tool
| Detail | 
String Utility Belt | 
Responsive Tool |
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| What it does | Free online string and text tools for encoding, decoding, hashing, formatting and converting text in your browser
| Free responsive website checker for mobile, tablet and desktop
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| Stage | Not given
| Not given
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| Founded | Not given
| Not given
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| Based in | Not given
| Not given
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| Pricing model | Free
| Free
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| Pricing | Not given
| Not given
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| Key features | - Base64 encoding and decoding
- URL encoding and decoding
- JSON formatting, validation and minifying
- JWT decoding with readable timestamps
- SHA-256 and other cryptographic hashing
- UUID generation with multiple versions
- Text diffing with multiple formats
- Chainable pipelines with live preview
- CSV to JSON and JSON to YAML conversion
- Regular expression explanation in plain English
| - Test multiple device viewports simultaneously
- Real CSS viewport rendering
- Share setup links
- Custom pixel width testing
- No installation required
- Sync scroll across panes
- Browser-based with no account needed
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| What makes it different | - All processing happens in your browser with no data uploaded to servers
- Chain multiple tools into pipelines with live preview of each step
- Available across VS Code, CLI, MCP and as a Node.js library
- No cookies or tracking scripts, privacy-focused
- 248 utilities organized by category with guides and worked examples
| - Compare multiple real device widths side by side instead of switching one at a time
- Faster than DevTools for checking several device sizes at once
- Entirely browser-based with no setup, signup or download
- Built and maintained by one developer in the open
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| Free plan | Not given
| Not given
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| Open source | Not given
| Not given
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| Platforms | Not given
| Not given
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| Public API | Not given
| Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 38 ▲ +1 (up) since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 5 | 1 |
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| Citation Flow (Majestic) | 24 | 25 |
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| Referring domains (Majestic) | 18 | 14 |
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4 details filled in for both companies.
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