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A collection of free online tools for developers. Format JSON, encrypt data, calculate hashes, and more.

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Popular Tools

AES Decryption

AES Decryption

AES Decryption tool
AES Encryption

AES Encryption

AES Encryption tool
Base64 Decode

Base64 Decode

Base64 Decode tool
Base64 Encode

Base64 Encode

Base64 Encode tool
JSON Formatter

JSON Formatter

JSON Formatter tool
JSON Minifier

JSON Minifier

JSON Minifier tool
JSON Validator

JSON Validator

JSON Validator tool
MD5

MD5

MD5 tool
QR Code Generator

QR Code Generator

QR Code Generator tool
SHA1

SHA1

SHA1 tool
SHA256

SHA256

SHA256 tool
SHA3-256

SHA3-256

SHA3-256 tool
SHA512

SHA512

SHA512 tool
URL Decode

URL Decode

URL Decode tool
URL Encode

URL Encode

URL Encode tool

Curated Collections

Developer Pack

Essential tools for daily development workflows

Base64 Encode Base64 Decode URL Encode URL Decode JSON Formatter JSON Minifier JSON Validator MD5 SHA256

Security Pack

Hashing, encryption, signing, and key generation tools

SHA256 SHA512 SHA3-256 AES Encryption AES Decryption RSA Encryption RSA Decryption RSA Sign Message RSA Verify Signature ECDSA Sign Message ECDSA Verify Signature

Data Pack

JSON, XML, and structured data transformation tools

JSON Formatter JSON Minifier JSON Viewer JSON Validator XML Formatter XML Minifier XML Validator

Text Pack

Text encoding, decoding, and case conversion tools

Base64 Encode Base64 Decode Encode String to Hex (Base16) Decode Hex (Base16) to String HTML Encode / Escape HTML Decode / Unescape

Browse by Category

Hash

CRC MD SHA1 SHA2 SHA2-512 SHA3 Keccak SHAKE cSHAKE KMAC RIPEMD BLAKE

Cryptography

AES DES Triple DES RC4 ECDSA RSA

Encode / Decode

Hex (Base16) Base32 Base58 Base64 HTML URL

Formatters

JSON XML

Converters

Case

Utility

QR / Barcode Others