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Text of the page (random words):
free string to lowercase converter online w3docs w3docs livres apprendre le html apprendre le css apprendre javascript apprendre git apprendre java apprendre php apprendre python cours questionnaires exercices snippets outils general tools html editor password generator html encoder code diff json beautifier tous les 13 color tools color picker color converter color mixer color hex colors hsl tous les 10 string tools string length calculator md5 hash generator sha256 hash generator string reverse url encoder tous les 19 code formatters javascript formatter css formatter html formatter json formatter php formatter rechercher sur w3docs k fr english en deutsch de русский ru français fr español es português pt italiano it se connecter home tools string functions string to lowercase converter string functions string to lowercase converter convert any string to lowercase unicode aware so locale sensitive characters fold correctly source result clear copy submit about converting text to lowercase this tool converts any text you paste to lowercase every uppercase letter becomes its lowercase equivalent while digits punctuation spaces and line breaks pass through unchanged it runs entirely in your browser there is no server round trip so nothing you type is uploaded logged or stored click submit to run the conversion against whatever is in the source box the result does not update automatically as you type under the hood the transform is one call javascript s string prototype tolowercase it is not a plain a z swap it applies unicode s default case conversion mapping so accented and non latin letters fold correctly too é becomes é ω becomes ω this mapping is locale independent by design a handful of languages have case rules that differ from the unicode default turkish s dotted and dotless i is the classic example see the faq below and tolowercase intentionally ignores those in favor of one consistent result everywhere lowercasing is a normalization step as much as a formatting one case insensitive comparisons matching a username or tag regardless of how it was typed building predictable url slugs deduplicating entries and preparing text for search indexing typically lowercase the input first it is also a required pre step for some hashing schemes gravatar for instance specifies trimming and lowercasing an email address before md5 hashing it this differs from css s text transform lowercase which only changes how text is displayed and leaves the underlying string untouched examples what submit does text input make this text quiet output make this text quiet this is the tool s own placeholder text submit runs s tolowercase against the source box and writes the result into the read only result box nothing updates live as you type the javascript one liner js café résumé tolowercase café résumé the exact call the tool makes internally no library or locale argument is needed for tolowercase to fold accented latin greek cyrillic and more php strtolower vs mb_strtolower php s café résumé strtolower s café résumé only touches ascii a z mb_strtolower s café résumé utf 8 aware matches js php s plain strtolower is byte based and only touches ascii a z by default mb_strtolower or this tool via javascript is what you want for utf 8 text frequently asked questions does this tool send my text to a server no the conversion runs entirely in your browser using javascript s string prototype tolowercase your input is never uploaded logged or stored reload the page and it s gone does tolowercase handle the turkish i̇ correctly not by default converting i̇stanbul with plain tolowercase maps the turkish dotted capital i̇ u 0130 to i plus a separate combining dot above two code points instead of one so the result is i̇stanbul 9 characters instead of the plain istanbul 8 most people expect correct turkish behavior needs tolocalelowercase tr which this tool does not use what s the difference between tolowercase and tolocalelowercase tolowercase which this tool uses always applies the same unicode standard mapping regardless of language tolocalelowercase locale can apply language specific rules instead for turkish specifically it maps i̇ to a plain i and i to a dotless ı neither of which the locale independent version produces is javascript s tolowercase the same as php s strtolower no javascript s tolowercase is unicode aware by default php s strtolower only converts ascii a z and leaves accented uppercase letters like é untouched php needs mb_strtolower for correct utf 8 behavior how is this different from css s text transform lowercase css s text transform lowercase only changes how text is displayed the underlying string and whatever gets copied or submitted from a form is unchanged this tool rewrites the actual text which is what you need before storing comparing or hashing a value related tools string to uppercase converter the opposite conversion extra spaces remover normalize whitespace alongside case before comparing or storing text string to md5 hash generator lowercase first for case insensitive fingerprints e g gravatar style email hashes all string functions browse the full set of string tools learn more lesson javascript strings string methods including case conversion in depth lesson css text transform property the display only css based alternative to actually rewriting the string lesson strtolower php s equivalent function and where it differs from javascript s all string functions w3docs tutoriels exemples exercices snippets et quiz gratuits pour le web depuis 2014 livres apprendre le html apprendre le css apprendre javascript apprendre git apprendre java apprendre php apprendre python pratique exercices questionnaires éditeur try it outils html editor password generator html encoder code diff json beautifier société à propos contact politique de confidentialité langue english deutsch русский français español português italiano 2026 w3docs tous droits réservés fait pour les développeurs