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Browse Tool Plaza by category—developer utilities, everyday calculators, image tools, leisure helpers, and health estimators with guides on every page.

All tags AES Chinese DES Easter Gregorian Italian Julian MD MD5 Mayan RC4 RIPEMD RIPEMD-160 Rabbit SHA SHA-1 SHA-2 SHA-256 SHA-3 abi account age algorithm animal arabic arrangements ascii astrand-formula auth ball-state-university-formula bank base64 base64-encoded bill binary bingo bmi body cab calculate calculate-age calculator calendar caloric-needs calories casual cerretelli-formula certificate character checksum chinese cin cipher code coin coin-flip collapse-whitespace colors combinations combinations-no-repetitions combinations-with-repetitions combinatorial-calculus contrast-checker convert cooper-formula count-characters count-whitespace countdown country credit crypto csv csv-to-json cunningham data data-converter data-size-converter date date-difference days days off days-between decode developer devine dog dog-years dominant-color double easter editor elapsed emoji encode encoding encrypt entities entropy epoch escape extract-matches fat finance fiscal-code flag format format-json format-xml formatter from-aes-to-message from-arabic-to-roman from-ascii-codes-to-text from-base64-to-text from-binary-to-text from-date-to-unix-timestamp from-des-to-message from-feet-to-meters from-hex-to-hsl from-hex-to-rgb from-hex-to-text from-hsl-to-hex from-html-entities-to-text from-jpg-to-png from-jpg-to-webp from-json from-json-to-xml from-message-to-aes from-message-to-des from-message-to-rabbit from-message-to-rc4 from-message-to-rc4-drop from-message-to-triple-des from-png-to-jpg from-png-to-webp from-rabbit-to-message from-rc4-drop-to-message from-rc4-to-message from-rgb-to-hex from-roman-to-arabic from-text-to-ascii-codes from-text-to-base64 from-text-to-binary from-text-to-hex from-text-to-html-entities from-text-to-url-encoded from-triple-des-to-message from-unix-timestamp-to-date from-url-encoded-to-text from-webp-to-jpg from-xml-to-json fun funny generate generator get-image-info gfm giulian gregorian hash hashing health heart hex hmac holidays horoscope html html-entities hydration iban ideal ideal-weight image image-converter imc index interest ipsum json json-minify json-pretty json-to-csv json-xml jump jwt ldl lean leap leap-year leetspeak length license liesen-formula loan lorem lorem-ipsum lottery luhn luhn-generate luhn-validate markdown mass match math maximum maya mellerowicz-formula metrics mifflin miller minify mix mod-97 mod97 modul mortgage name names nation need normalize numbers operator overtime pace pace-from-time parse partial-permutation-no-repetitions partial-permutation-with-repetitions password passwords path pattern people percent percent-change percentage percentage-calculator permutations permutations-no-repetitions permutations-with-repetitions pets pick plate png pomodoro predict-finish pretty preview prizes query quote race random rate rates read reader regex regexp remove-accents remove-newlines render resize resize-by-dimension restaurant reverse-text rgb robinson roll-custom roll-d6 roman rope run running secrets security self self-signed-cert seo server sha show shuffle shuffle-list sign-hs256 signed simulate simulator sitemap slug slugify split split-vowels-consonants sport strength strip-html svg swear tanaka-formula tax temperature temperature-converter test test-pattern text texts time timer timestamp timezone tip to-json token travel-duration unit-converter units universal-converter unix uri url url-codec uuid vacation valid validate validate-by-country validate-url vat vat-number verify voice volume walk water webp weight what-percent-is-x-of-y wheel work x-percent-of-y xml xslt yaml years yml zodiac

Generate SHA-1

Produce a SHA-1 hash digest from text using the SHA-1 algorithm in the browser.

hashalgorithmSHA

HMAC SHA-1

Generate an HMAC-SHA1 hex digest from a message and secret key for legacy integrations.