Free Online Utility Tools
A grab-bag of handy utilities for developers and security researchers: network and DNS tools, file inspectors, image tools, AI tokenizers and more. Everything runs in your browser.
DevOps
CI/CD and infrastructure secrets
Network Tools
DNS, IP and protocol utilities
WiFi QR Code Generator
Create customizable QR codes online for WiFi network access.
Open toolQR Code Generator
Create customizable QR codes online for text.
Open toolURI ↔ Multiaddr Converter
Quickly convert any URI to a Multiaddr and vice versa for network applications or blockchain tools.
Open toolTLS Cipher Suite Decoder
Decode TLS cipher suite codes and names into their parts. Runs offline.
Open toolMQTT Packet Decoder
Decode MQTT control packets into header and fields. Runs offline.
Open toolgRPC-Web Frame Decoder
Decode gRPC-Web frames and their protobuf payloads. Runs offline.
Open toolCoAP Packet Decoder
Decode CoAP IoT packets into header, options and payload. Runs offline.
Open toolImage Tools
Image inspection and conversion
Text Tools
Transform and format text
File Tools
Inspect, parse and convert files
File Entropy Checker
Easily check file integrity by generating and comparing hash values using various algorithms.
Open toolDS_Store Viewer
Upload a .DS_Store file to extract hidden filenames and folder paths. Useful for web recon, bug bounty, and penetration testing.
Open toolProtobuf Decoder
Easily decode Protobuf messages for debugging and analysis.
Open toolFile Signature Identifier
Detect file types from magic bytes, hex data, Base64 content, or uploaded files.
Open toolAI Tools
Tokenizers and AI helpers
Security
Credentials and secret recovery
X.509 Certificate Decoder
Instantly decode any X.509 certificate (PEM, DER, or hex). View subject, issuer, expiry, SANs, fingerprints, and more - free and private.
Open tool.git Secret Scanner
Scan a dumped .git directory for leaked secrets, keys, and credentials. Runs offline.
Open toolPickle / ML Model Scanner
Scan pickle & ML model files for malicious code-execution imports. Runs offline.
Open toolJWT Decoder & Attack Toolkit
Decode, sign, verify & attack JWTs (alg:none, confusion, brute-force) - fully client-side.
Open toolASN.1 / DER Decoder
Decode ASN.1 / DER from PEM, base64 or hex into a tree. Runs offline.
Open toolSAML Response Decoder
Decode SAML requests and responses into readable XML. Runs offline.
Open toolKerberos Ticket Converter
Convert Kerberos tickets between kirbi and ccache. Runs offline.
Open toolEd25519 / secp256k1 Sign-Verify
Generate keys, sign and verify with Ed25519 or secp256k1. Runs offline.
Open toolSSH Key Fingerprint
Get SHA256/MD5 fingerprint and randomart of an SSH key. Runs offline.
Open toolJWK ↔ PEM Converter
Convert keys between JWK and PEM (RSA, EC). Runs offline.
Open toolPassword Strength Estimator
Estimate password entropy and crack time. Runs offline.
Open toolShamir's Secret Sharing
Split and recover secrets with Shamir's Secret Sharing. Runs offline.
Open toolZero-Width Character Tool
Detect, strip and hide messages in zero-width characters. Runs offline.
Open toolDeveloper
Everyday developer utilities
ABI to Solidity Interface
Generate a Solidity interface from an ABI JSON (functions, events, errors, structs). Runs offline.
Open toolEthereum ABI Encoder / Decoder
Encode & decode Ethereum ABI calldata, return data, and event logs. Runs offline.
Open toolPunycode / IDN Converter
Convert IDN domains between Unicode and Punycode (xn--). Runs offline in your browser.
Open toolUnix Timestamp Converter
Convert Unix epoch timestamps to dates and back. Runs offline.
Open toolUUID / ULID Tool
Generate and inspect UUIDs and ULIDs. Runs offline.
Open toolNumber Base Converter
Convert numbers between bases and view a hexdump. Runs offline.
Open toolSnowflake ID Decoder
Decode Discord, Twitter and Instagram snowflake IDs. Runs offline.
Open toolData URI Builder / Parser
Build and parse data: URIs. Runs offline.
Open toolLuhn / IBAN / ISBN Validator
Validate Luhn, IBAN and ISBN checksums. Runs offline.
Open tool