Developer Tools APIs.
Developer tool APIs are the small utilities every service ends up needing — format conversion, IDs, hashes, token decoding, DNS and WHOIS lookups. Hosted so they don't become twelve copy-pasted helpers across your repos.
Also called utility APIs, dev utility APIs or helper APIs90 services in this categoryDeveloper Tools APIs
90 servicesSchedule Cron API
Compute the next fire times for a 5-field cron expression. Returns the original expression plus an array of upcoming timestamps for scheduling UIs.
Dosvak LLCFormat Date API
Format an ISO datetime string with any Python strftime pattern. Returns the input, the format used, and the result for logs, exports, and displays.
Dosvak LLCCheck Spelling API
Send a word or phrase and get back each misspelled word with a suggested fix. A lightweight GET spell check API for search, forms and live input. Try Free.
Dosvak LLCGenerate Password API
Generate cryptographically secure passwords with configurable length and optional symbols. Returns the password and its length for signup flows.
Dosvak LLCConvert HEX to RGB/HSL API
Convert a HEX color into RGB and HSL values in one call. Built for design tools, theming systems, and frontends that need normalized colors.
Dosvak LLCGenerate Random String API
Generate random strings up to 256 characters in alpha, alphanumeric, numeric, or hex form. Built for test data, tokens, and placeholder IDs.
Dosvak LLCGenerate Random Number API
Generate a cryptographically secure integer between a minimum and maximum. The response returns the chosen value and the range used.
Dosvak LLCGenerate Hash API
Hash any text string with MD5, SHA1, SHA256, or SHA512. Returns the original input, the algorithm used, and the computed hash for checksums.
Dosvak LLCDescribe Cron API
Break a cron expression into labelled minute, hour, day, month, and weekday fields. Built for schedule previews, cron editors, and readable logs.
Dosvak LLCConvert Units API
Convert a numeric value from one unit to another using value, from_unit, and to_unit. Returns the original units plus the converted result.
Dosvak LLCEncode and Decode JWT API
Encode JSON payloads into JWTs and verify existing tokens with a shared secret. Returns a signed token, or validity plus the decoded payload.
Dosvak LLCEncode and Decode Base64 API
Encode UTF-8 text to Base64 or decode it back to plain text over HTTP. Useful for payload inspection and round-trip checks in scripts.
Dosvak LLCWhich Developer Tools API do you need?
The question you arrived with, and the endpoint that answers it.