CalculatorsEMI, SIP, GST, percentages and more — instant, accurate, free.ConvertersUnit and number-base converters for everyday engineering.FormattersBeautify, validate and transform text and code.GeneratorsUUIDs, passwords and other things you need on demand.CryptographyHashes and encodings, computed locally in your browser.Data & TransformConvert JSON, CSV, YAML, XML & TOML — and generate code from JSON.CSV ToolsConvert, clean, filter, analyze and transform CSV files — all in your browser.Encoding & DecodingBase64, Base32/58/62, Hex, Octal and Punycode encoders & decoders.Text ToolsCase conversion, counting, sorting, dedupe, reverse and more.ValidatorsValidate JSON, YAML, XML, CSV, TOML and more — with clear error messages.Repair ToolsFix broken JSON, CSV, XML, YAML and other malformed data.Diff & CompareCompare two texts, JSON, CSV, YAML, XML and more — highlight the differences.QR & BarcodesGenerate WiFi, vCard, URL and other QR codes, plus Data Matrix & Aztec barcodes.MinifiersShrink JSON, CSS, JavaScript, XML and SVG by removing whitespace.BeautifiersPretty-print and indent CSS, HTML and JavaScript.Security & TokensJWT, HMAC, key pairs, TOTP, PKCE, secure tokens and password tools.Developer UtilitiesCron, regex, timestamp, URL, JSONPath, XPath, escaping and more.Format ConvertersMarkdown⇄HTML, env/INI/properties⇄JSON, NDJSON, SVG data-URI and more.Image ToolsResize, crop, convert, compress, recolor and extract palettes — all in your browser.Sitemap & SEOValidate, split, merge, analyse and generate XML sitemaps — paste the XML, nothing is uploaded.
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17 free tools · runs in your browser

Cryptography

Hashes and encodings, computed locally in your browser.

Hash GeneratorSHA-2, SHA-3, BLAKE, RIPEMD, Whirlpool and more, at once.Base64 Encoder / DecoderUTF-8-safe Base64 encoding and decoding.URL Encoder / DecoderPercent-encode or decode URLs and query strings.JWT Decoder & VerifierDecode a JWT and verify its signature.HMAC GeneratorKeyed HMAC over any supported hash.MD5 Hash GeneratorCompute MD5 checksums of text (legacy).JWT SignerMint a signed JWT with HS, RS, PS, ES or EdDSA.CSR GeneratorPKCS#10 certificate signing requests with SANs.X.509 Certificate GeneratorSelf-signed certificates and a local CA, with linting.Key Pair GeneratorEd25519, ECDSA, X25519 and RSA, in every format.ASN.1 / DER DecoderDecode certificates, keys and any DER structure.Key / Certificate / CSR MatcherCheck whether a key, certificate and CSR belong together.AEAD Encrypt / DecryptAES-GCM and ChaCha20-Poly1305, with tamper detection.Password Hash GeneratorArgon2, bcrypt, scrypt and PBKDF2, with verification.Encryption Key GeneratorAES, ChaCha20 and more, with a matching IV.Encoding ConverterHex, Base32, Base58, Base64 and more, side by side.WordPress Salts GeneratorFresh security keys and salts for wp-config.php.