Case Converter

Convert any text between 8 letter cases — one click each, then copy.

Quick answer: Free case converter: switch text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and kebab-case. One click, copy ready.

How to use

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Fill in the fields above.
Get your result instantly — nothing is uploaded.

About this tool

A case converter transforms text between letter cases: UPPERCASE for headlines, lowercase for cleanup, Title Case for titles, Sentence case for paragraphs, plus programmer cases (camelCase, snake_case, kebab-case, CONSTANT_CASE) for code and URLs. Fix accidentally-caps-lock text in seconds.

Every Case, One Paste (2026 Guide)

This page converts any text between UPPERCASE, lowercase, Title Case, Sentence case, and the programmer cases — camelCase, snake_case, kebab-case, CONSTANT_CASE — instantly in your browser, no upload, no signup. Below: the exact transformations the engine applies, a worked example you can reproduce by pasting it in, and which case belongs where.

One input, eight outputs

Paste wedding gift amount calculator and the engine produces:

Mode	Output
UPPERCASE	WEDDING GIFT AMOUNT CALCULATOR
lowercase	wedding gift amount calculator
Title Case	Wedding Gift Amount Calculator
Sentence case	Wedding gift amount calculator
camelCase	weddingGiftAmountCalculator
snake_case	wedding_gift_amount_calculator
kebab-case	wedding-gift-amount-calculator
CONSTANT_CASE	WEDDING_GIFT_AMOUNT_CALCULATOR

Title mode lowercases everything, then capitalizes the first letter of every word — including small words like "of" and "the", which is the simpler headine style; strict editorial style (Chicago) leaves those lowercase, so tweak by hand when a style guide demands it. Sentence mode capitalizes after ".", "!", and "?" boundaries. The programmer modes split on non-alphanumerics and rejoin, which is why they collapse "already-hyphenated text" cleanly.

Which case belongs where

Headlines and ad copy take UPPERCASE sparingly — all-caps reads as shouting beyond five or six words. Body paragraphs take Sentence case. Variable and column names take snake_case or camelCase per your language convention, URLs take kebab-case (hand the output to the slug generator if you also want to strip stop-words), and bio-style Unicode fonts are a different tool entirely — a case converter changes case, not alphabet. Reformatting a whole document instead of a headline? Run it through the text diff checker afterward to confirm only case changed, and the word counter if the brief also has length limits.

FAQ

What is Title Case?

Every major word starts with a capital letter — used in headlines and titles.

What is kebab-case?

All lowercase words joined by hyphens, e.g. my-page-url — common for URLs and file names.

Can I convert back and forth?

Yes — just click any case button again on the new text.

Do I need to download a case converter app?

No — this converter runs entirely in your browser tab, which is why it works with zero install, zero signup, and no copy-paste into another program. Nothing is uploaded to a server, the text never leaves your machine, and once the page has loaded it keeps working even if you go offline. Bookmark it; it replaces the downloadable utility entirely.

Does Title Case capitalize small words like 'a', 'the', 'of'?

In this engine, yes — every word gets a capital, which matches headline conventions used by most news and marketing teams. Strict style guides (Chicago, AP) lowercase articles and short prepositions mid-title. If you are writing to one of those, convert first, then manually lowercase the handful of small words; the reverse order does not work.

Are accented characters handled?

UPPERCASE and lowercase modes handle all Unicode letters — café → CAFÉ works as expected. Title Case uses an ASCII-focused pattern, so a word starting with an accented letter (éclair) can keep its lowercase first letter. Convert such text with upper/lower, or fix the first letters manually after title-casing.

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The complete case converter guide

Prefer the long version — a worked example, the mistakes people actually make, and answers to real questions? The blog guide Case Converter — Complete Guide, Mistakes & FAQ covers all of it step by step.

Browse the collection: Text Tools — All 60 Free Online Tools

Case Converter

How to use

About this tool

Every Case, One Paste (2026 Guide)

One input, eight outputs

Which case belongs where

FAQ

Rate this tool

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The complete case converter guide