Online Encryption & Developer Tools

Encrypt armored text to pasted public keys or decrypt it with a matching private key

Create a passphrase-protected Curve25519 OpenPGP key pair and revocation certificate

Split a secret into threshold shares and recombine it.

Create PDF 1.7 AES-128 password protection for a supported, unencrypted PDF

Create EOE1 AES-GCM text by default with explicit legacy compatibility

Create package-specific Blowfish output for tested legacy compatibility

Recover package-specific legacy Blowfish output

Generate Let's Encrypt Certificate

Identify PEM and DER key or certificate blobs, algorithm families, and private-key risk

Check whether certificates, CSRs, public keys, and private keys contain the same public key

Analyze PEM certificate bundles, likely chain order, and hostname matches

Decode PEM certificates and inspect certificate fields

Decode certificate signing requests and inspect requested SANs, subjects, public keys, and signatures

Create certificate signing requests with SAN support

Convert PEM and DER (Base64) for certificates and keys

Generate RSA keys and encrypt or verify signatures

Build SigV4 headers and signatures for AWS requests

Encrypt a URL string with EOE1 AES-GCM by default

Decrypt EOE1 URL ciphertext or explicitly selected legacy AES-CBC

Encrypt short text with EOE1 AES-GCM and check the output length

Decrypt EOE1 short-message ciphertext or legacy AES-CBC

Encrypt a selected file into this site's authenticated .encr format

Recover files from this site's current and legacy encrypted formats

Create a standard AES-256 password-protected ZIP from files or one folder in your browser

Encrypt text with a Caesar cipher

Decrypt a Caesar cipher message

Inspect and decrypt standard OpenSSL enc AES-CBC salted payloads with explicit PBKDF2 or legacy recipe settings

Decrypt AES-GCM ciphertext with explicit key, IV, AAD, tag length, and separate or appended auth tag input

Create a compact JWE from UTF-8 text using a shared Base64URL key and the focused dir plus A256GCM profile

Decrypt and authenticate direct-key compact JWE tokens using the matching shared Base64URL key

Inspect PKCS#12 and PFX archives for certificates, key bags, and friendly names

Generate Ed25519 key pairs in hex, Base64URL, and JWK-ready forms

Sign messages and verify Ed25519 signatures with raw keys in hex or Base64URL

Decode SAML responses and requests, inspect protocol fields, and compare expected identity values

Compare registered and sent OAuth callback URLs exactly and isolate redirect URI differences

Inspect pasted OIDC discovery or OAuth authorization server metadata and isolate exact configuration mismatches

Decode Base64 image data into a preview and download it

Encode or decode URL-safe Base64 strings

Chain gzip, Base64URL, and URL encoding steps

Encode URL string with percent URL encoding

Decode a percent encoded URL string

Decode a JSON Web Token and inspect risky claims

Inspect a single JWK or full JWKS and compare token header hints against pasted keys

Select a JWK from a JWKS and emit PEM public-key output

Calculate RFC 7638 thumbprints from public JWK material

Check JWT signatures against an explicitly selected algorithm and selected claims

Generate RFC 7636 code verifier and code challenge pairs

Encode text as RFC 4648 Base32

Decode RFC 4648 Base32 strings into text and raw bytes

Build otpauth:// TOTP enrollment URIs from issuer, account, and Base32 secret input

Decode protected headers from compact JWE tokens

Transform HTML to Markdown

Transform Markdown to HTML

Transform YAML to JSON

Transform JSON to YAML

Transform CSV to JSON

Transform JSON to CSV

Flatten nested JSON into CSV columns

Transform Hex to ASCII

Transform ASCII to Hex

Convert HTML to Text

Transform JSON to Base64

Decode Base64 encoded JSON into readable structured output

Decode Base64 encoded XML into readable structured output

Encode XML to Base64

Convert JSON to XML

Convert XML to JSON

Convert JavaScript object to JSON

Convert valid JSON into a JavaScript object literal

Format a YAML string or file

Validate YAML and find syntax errors

Format an HTML string or file

Format and indent a well-formed XML string

Format a PHP string or file

Resolve RFC 6901 JSON Pointer paths against pasted JSON

Apply RFC 6902 JSON Patch operations and inspect the resulting document

Canonicalize JSON into a deterministic byte sequence

Validate JSON against a pasted schema and inspect exact error paths

Evaluate JSONPath expressions and inspect matched values plus result paths

Generate a v1 or v4 GUID string

Generate a v1 or v4 UUID string

Inspect UUID version, variant, and timestamp behavior

Generate sortable UUID v7 values and decode the embedded timestamp

Generate sortable ULIDs and decode the embedded timestamp

Minify, uglify and compress JSON file or string

Unminify, format and beautify JSON file or string

Minify, uglify and compress XML file or string

Identify marked password-hash formats and review possible algorithms for raw digest-shaped values

Create a SHA-1 hash for legacy checksums

Create a cryptographic hash using SHA-512

Generate and verify HMAC signatures in hex, Base64, or Base64URL

Verify Stripe, GitHub, and generic HMAC webhook signatures

Generate SHA-256 checksums for files

Generate MD5 output for existing checksum and migration workflows

Generate bcrypt hashes with a selectable work factor

Verify a Bcrypt hash

Generate CSP hash tokens for exact inline script or style content

Generate CSP nonces and matching policy or HTML snippets

Generate Subresource Integrity hashes for pasted asset content

Generate Argon2id encoded password hashes with explicit cost parameters

Verify plaintext passwords against encoded Argon2id hashes

Derive deterministic key bytes with PBKDF2-HMAC-SHA-256 or SHA-512 and explicit salt and iteration settings

Compare two texts, JSON payloads, YAML, or code with a readable diff and exportable patch.

Redact secrets from logs, JSON, YAML, headers, and .env files before sharing

Inspect pasted HTTP response headers, browser policies, and cookie attributes

Obfuscate JavaScript code for testing and review, then validate the output in your environment

Translate and edit cron expressions

Count characters, letters, digits, spaces, and lines in text

Count words in text

Convert lowercase to uppercase

Convert uppercase to lowercase

Converter Unix Timestamps

Normalize Unix timestamps and explicit-offset date strings into RFC 3339 UTC output

Send one direct browser HTTPS request and measure elapsed request time.

Convert local datetimes between IANA time zones and inspect the UTC instant