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See how your money grows with an initial amount, monthly contributions and compound interest, using today’s Selic and CDI rates. Free, no sign-up.

Official results, prizes, winners and statistics for Brazilian and US lotteries, with a ticket checker and number generator.

Encode and decode Base64 online for free: text with accents and emoji (UTF-8), files and images, data URLs and the URL-safe variant. All in your browser.

Convert between HEX, RGB, HSL, HWB and OKLCH, check WCAG contrast (AA/AAA) and generate tints and shades, ready for CSS and Tailwind.

Compare Brazilian CDBs, LCI/LCA, Treasury bonds (Selic, fixed-rate, IPCA+) and savings for the same amount and term, with taxes and real return.

Generate MD5, SHA-1, SHA-256 and SHA-512 hashes of text or files, compare with the expected checksum and compute HMAC. Free, in your browser: nothing is uploaded.

Format, validate and minify JSON online for free. Shows the exact error line and column, sorts keys and has a tree view. Runs in your browser: nothing is uploaded.

Decode JWTs online: see the header, payload and exp, iat and nbf dates, and verify HS256 signatures. The token never leaves your browser.

Generate strong passwords and easy-to-remember passphrases, with entropy and estimated time to crack explained honestly. All in your browser.

Create free QR codes for menus, WhatsApp, Wi-Fi, Pix and business cards with your brand colors and logo. Download PNG or SVG, no sign-up.

Test JavaScript regex with live highlighting, named groups, flags and replace preview. Ready-made patterns for email, URL and IPv4. Free, in your browser.

Convert Unix timestamps (s, ms, µs, ns) to dates and back in any time zone, with ISO 8601, RFC 2822 and batch mode. Free, runs in your browser.

Encode and decode URLs online (encodeURIComponent vs encodeURI), with precise errors and a URL parser with editable query params. Runs in your browser.

Generate UUID v4, UUID v7, ULID and NanoID in your browser, one or up to 1,000 at once, and validate any UUID to see its version, variant and timestamp.