The collection

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Count, clean, compare and transform your writing. Text stays in your browser.

Resize, convert and inspect images with bounded processing and no permanent image storage.

Query live DNS resolvers and inspect public websites using bounded, SSRF-protected requests.

Format structured data, encode values and debug developer inputs without sending private content to a server.

Convert defined physical and digital units using explicit factors and temperature formulas.

Solve everyday arithmetic and financial scenarios with visible formulas and stated assumptions.

Work with calendar dates, elapsed durations and explicit IANA time zones, including daylight saving transitions.

Inspect markup, generate web configuration and run controlled website checks with clearly stated validation limits.