Yes. Free with no account and no paid tier.
CapyToolkit is a free reference library that happens to contain 45+ working tools. The catalog spans nine categories: hardware and display diagnostics, developer parsers and encoders, security and privacy tools, audio and acoustic testing, math and engineering calculators, text a...
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What you get
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Nine tool categories
45+ tools in nine categories, from hardware diagnostics to personal tools
Personal tools
Personal tools for passport photos, PDFs, phone scans, image size limits, and receipt splitting
Reference content
Example-driven reference content on every tool page
Searchable references
Searchable references: MIME types, HTTP status codes, unit conversions
Hands-on blog
A blog with hands-on guides and buying advice across the same topics
Runs locally
Everything computes locally, free, with no account required
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