QR9.NET Online Tools

Welcome to QR9.NET. This site bundles a set of online tools designed to improve productivity while keeping your data private.

Your input stays in the browser for every tool on this site. All tools rely on HTML5 and client-side computation instead of uploading your data to our servers.

Cryptography

RSA Encryption & Decryption

Encrypt and decrypt short text with RSA in your browser

RSA Sign & Verify

Create and verify RSA signatures online

RSA Key Pair Generator

Generate RSA public and private key pairs in PEM format

PEM/XML Key Converter

Convert RSA keys between PEM and XML

RSA Private Key Password

Add, change, or remove RSA private key passwords

Ed25519 Key Pair Generator

Generate random Ed25519 public and private keys

Ed25519 Sign & Verify

Create and verify Ed25519 signatures online

ChaCha20 Encrypt & Decrypt

Encrypt and decrypt data with ChaCha20

Symmetric Encrypt/Decrypt

Encrypt and decrypt with AES, TripleDES, Rabbit, and RC4

Bcrypt Hash/Verify

Hash and verify strings with bcrypt

Hash Generator

Generate MD5, SHA, SHA-3, and RIPEMD160 hashes

File Hash Calculator

Calculate MD5, SHA, SHA-3, and RIPEMD160 digests for local files

HMAC Generator

Generate HMAC values with MD5, SHA, SHA-3, and RIPEMD160

UUID Generator

Generate UUID and GUID values, including UUID v1 and v4

ULID Generator

Generate ULIDs as an alternative to UUIDs

Random Password Generator

Generate random passwords, tokens, and strings

Encoding

Text Encoding Converter

Convert between UTF-8, UTF-16LE, UCS-2, Latin1, Base64, ASCII, hex, and byte arrays

URL Encode/Decode

Encode and decode special characters in URLs

Base64 Encode/Decode

Encode strings to Base64 and decode Base64 back to text

Unicode Encode/Decode

Encode and decode Unicode escape sequences online

JSON Tools

JSON Formatter

Format, edit, and validate JSON online

JSON/XML Converter

Convert JSON to XML and XML to JSON

JSON Diff

Compare two JSON strings or objects and inspect their differences

XML Formatter

Beautify XML strings into a readable format

Other Tools

Online Metronome

Online metronome with BPM, Tap Tempo, time signatures, swing, count-in, silent bars, and tempo training

Audio to MIDI

Convert MP3, WAV, OGG, AAC, WMA, and other audio files to MIDI

Image EXIF Viewer

Inspect image EXIF metadata online

QR Code Generator & Decoder

Generate and decode QR codes

Timestamp Converter

Convert date and time values into Unix timestamps, ISO 9075, ISO 8601, and more

Color Picker & Converter

Pick colors online and convert between hex, rgb, hsl, hwb, lch, and device-cmyk