ThreatFoundtools
13 free tools · no signup · no uploads

Security tools that never leave your browser.

Hashing, JWTs, CVSS, encoding, network math, generators — a fast toolkit for day-to-day security work. 100% client-side. Your data is never uploaded.

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Nothing uploaded Instant, offline-capable No ads, no tracking

Hashing & Crypto

2

Hash Generator

MD5, SHA-1, SHA-256, SHA-384 & SHA-512 of any text — instantly.

HMAC Generator

Keyed-hash message authentication (HMAC-SHA256/512) for signing.

Encoding

4

Base64 Encode / Decode

Base64 and URL-safe Base64, both directions, UTF-8 aware.

URL Encoder / Decoder

Percent-encode and decode URLs and query components.

Text ⇄ Hex

Convert text to hexadecimal and back, UTF-8 safe.

Timestamp Converter

Unix epoch ⇄ human date, with timezone and relative time.

Tokens

1

JWT Decoder

Decode & inspect JSON Web Tokens — header, claims, expiry.

Network

1

CIDR / Subnet Calculator

Network, broadcast, host range and count for any IPv4 CIDR.

Generators

2

UUID Generator

Cryptographically-random UUID v4, single or in bulk.

Secret / Key Generator

Strong API keys, secrets and passphrases from CSPRNG.

Analysis

3

Password Strength

Entropy, crack-time estimate, and a strong generator — all offline.

CVSS 3.1 Calculator

Compute base score & severity from the CVSS v3.1 vector.

Hash Identifier

Guess the algorithm behind a hash by length & charset.