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Encoders, Hashes & Crypto
Base64, URL, HTML entity encoders, hash generators, JWT, UUID decoders and crypto tools. 65 free tools that run in your browser, no sign-up needed.
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Password GeneratorCreate strong passwords and passphrases.Hash GeneratorGenerate MD5, SHA-1, SHA-256 and SHA-512 hashes of text or files.MD5 Hash GeneratorGenerate MD5 hashes of text, lines or files and verify checksums.SHA-256 Hash GeneratorSHA-256 and HMAC-SHA256 hashes of text, lines or files, in hex or Base64.Base64 Encoder DecoderEncode or decode Base64 text and files, and make data URIs.URL Encoder DecoderPercent-encode or decode URLs, query strings and form data.HTML Entity Encoder / DecoderEscape and unescape HTML entities, named or numeric.Bcrypt Hash Generator & CheckerCreate bcrypt password hashes and check a password against a hash.Binary TranslatorConvert text to binary, hex, octal and back.HMAC GeneratorGenerate and verify HMAC signatures with SHA-256, SHA-512, SHA-1 or MD5.CRC32 Checksum CalculatorCalculate CRC-32, CRC-32C, CRC-16 and Adler-32 checksums of text or large files.JWT DecoderDecode JSON Web Tokens, read the claims and expiry, and verify HS256 signatures.JWT GeneratorCreate and sign HS256, HS384 or HS512 JSON Web Tokens in your browser and verify them.Password Strength CheckerSee how strong a password really is, how long it takes to crack and how to improve it.Caesar CipherEncode and decode Caesar shift ciphers and crack unknown shifts with a ranked brute force.Vigenère CipherEncrypt and decrypt Vigenère and Autokey ciphers, and crack unknown keys with frequency analysis.Atbash CipherEncode and decode Atbash ciphers (A↔Z, B↔Y) in Latin or Hebrew, with a live letter mapping table.ASCII TableFull ASCII code chart 0–255 in decimal, hex, octal, binary and HTML, with search and copy.Unicode Character LookupFind Unicode characters by name or code point and copy them with UTF-8, HTML and code escapes.Punycode ConverterConvert international domain names, emails and URLs between Unicode and xn-- Punycode, in bulk.JSON Escape / UnescapeEscape text for a JSON string, unescape \n and \" back to text, or stringify a whole object.Binary to HexConvert binary to hex instantly with steps and signed mode.Hex to BinaryConvert hex to binary instantly with steps and signed mode.Binary CalculatorAdd, subtract, multiply, divide, AND, OR, XOR and shift binary numbers with decimal values.Hex CalculatorHexadecimal + − × ÷ and AND, OR, XOR, NOT, shifts with decimal and binary equivalents.Base32 Encoder / DecoderEncode and decode Base32 (RFC 4648), Base32hex, Crockford and z-base-32 from text, hex or files.Base58 Encoder / DecoderEncode and decode Base58 and Base58Check (Bitcoin alphabet) from text or hex, with checksum verification.Unicode Escape / UnescapeConvert text to \uXXXX, \u{...}, \x, &#...; or CSS escapes and decode them back.File Hash CheckerGet MD5, SHA-1, SHA-256 and SHA-512 checksums of files and verify them against a hash.TOTP GeneratorGenerate 2FA one-time codes from a secret key, create otpauth QR codes and verify codes.RSA Key GeneratorGenerate 2048, 3072 or 4096-bit RSA key pairs as PEM, PKCS#1, JWK or OpenSSH, locally.SSL Certificate DecoderDecode PEM SSL/X.509 certificates: subject, issuer, expiry, SANs, key and fingerprints.Text Encryption ToolEncrypt and decrypt text with a password using AES-256-GCM, entirely in your browser.Argon2 Hash GeneratorHash passwords with Argon2id, Argon2i or Argon2d and verify them against an encoded hash.Base64 to PDFDecode a Base64 string to a PDF with preview and download, or encode a PDF to Base64.Bitwise CalculatorCalculate AND, OR, XOR, NOT and bit shifts at 8–64 bits with a bit grid and all bases.CSR GeneratorCreate a certificate signing request (CSR) and private key with SANs, RSA or ECDSA, in your browser.MongoDB ObjectId to TimestampDecode a MongoDB ObjectId to its creation date, or build ObjectIds from dates for range queries.PGP Encrypt / DecryptEncrypt, decrypt, sign and verify PGP messages with your armored keys, entirely offline.PGP Key GeneratorGenerate an OpenPGP key pair (Curve25519, NIST ECC or RSA) with passphrase and expiry, offline.Quoted-Printable Encoder / DecoderEncode or decode quoted-printable email text (MIME) with UTF-8 and 76-character soft line breaks.Self-Signed Certificate GeneratorCreate a self-signed SSL certificate and key for localhost or dev servers, as PEM or PFX.SHA-1 Hash GeneratorSHA-1 and HMAC-SHA1 of text or files in hex or Base64, plus Git blob hashes and verify.SHA-512 Hash GeneratorSHA-512 and SHA-384 hashes of text or files in hex or Base64, HMAC and hash verification.SRI Hash GeneratorCreate Subresource Integrity hashes (sha256/384/512) and ready <script> or <link> tags.SSH Key GeneratorGenerate Ed25519 or RSA SSH key pairs in your browser: OpenSSH public key plus private key.String Escape / UnescapeEscape or unescape strings for JavaScript, Java, C#, Python, C, SQL, regex, CSV and shell.UTF-8 Encoder / DecoderConvert text to UTF-8 bytes in hex, decimal, binary, \x or % and decode bytes back to text.UUID Decoder & ValidatorDecode any UUID: version, variant, v1/v6/v7 timestamp and MAC node, plus bulk validation.Base64 to FileDecode Base64 or a data URI to a downloadable file; detects the real file type and previews it.File Encryption ToolEncrypt and decrypt any file with a password using AES-256-GCM, entirely in your browser.Passphrase GeneratorMake strong, memorable diceware passphrases from a 7,776-word list, with entropy in bits.CSR DecoderDecode a PEM certificate signing request: subject, SANs, key size, signature and CA readiness checks.Enigma Machine SimulatorEncrypt and decrypt with a virtual Enigma I, M3 or M4: rotors, rings, plugboard and lampboard.Hex Opacity CalculatorConvert opacity percent to a 2-digit HEX alpha code and full #RRGGBBAA color, with a 0-100% table.Playfair CipherEncrypt and decrypt Playfair ciphers from a keyword, with the 5x5 key square and every digraph step.Pwned Password CheckerCheck if a password appeared in data breaches; only 5 characters of its SHA-1 hash are sent.RSA Encryption ToolEncrypt text with an RSA public key and decrypt it with the private key using RSA-OAEP in your browser.SAML DecoderDecode SAMLRequest and SAMLResponse messages to readable XML, attributes and validity times.SSL Certificate ConverterConvert SSL certificates and keys between PEM, DER, PFX/P12 and P7B in your browser.Checksum CalculatorCompute 8-bit sum, two's complement LRC, XOR/BCC, NMEA, Fletcher and Internet checksums of bytes.PBKDF2 Hash GeneratorDerive PBKDF2 keys from a password, salt and iteration count with SHA-1, SHA-256 or SHA-512.Protobuf DecoderDecode raw Protocol Buffers hex or Base64 without a schema, or add a .proto for field names.XML Escape / UnescapeEscape & < > " ' for XML text and attributes, unescape entities back, or wrap text in CDATA.Binary Search Tree VisualizerInsert, delete and find in BST, AVL and red-black trees with animated rotations and traversals.
About Encoders, Hashes & Crypto
Encode and decode Base64, URLs and HTML entities, generate MD5, SHA and bcrypt hashes, create strong passwords and inspect JWTs. Hashing and password generation happen locally, which matters when the input is sensitive.
Most used here: Password Generator, Hash Generator and MD5 Hash Generator.