Category / ToolsFam

Security & Privacy

24 free browser-based tools

Password, token, hash and secure header utilities

Most Used Security & Privacy

HTML Encode

Encode HTML-sensitive characters into entities for safe display.

Security & PrivacyLocal

HTML Decode

Decode HTML entities back into readable markup characters.

Security & PrivacyLocal

JWT Decode

Decode JWT header and payload locally without verifying or uploading tokens.

Security & PrivacyLocal

Password Generator

Generate strong random passwords locally with browser crypto for accounts, test users and vaults.

Security & PrivacyLocal

SHA-256 Checksum Generator

Create SHA-256 hashes for text verification, checksums and integrity comparisons in the browser.

Security & PrivacyLocal

Useful Security & Privacy Workflows

8 steps

Developer Debug Kit

Move from a confusing payload or failing request to readable data, decoded claims, safer URLs and a reproducible API check.

3 steps

Decode JWT Safely in Browser

Inspect JWT claims, expiry and URL encoding without sending tokens to a backend.

All Security & Privacy

Search within this category by tool name, slug, keyword, or workflow.

HTML Encode

Encode HTML-sensitive characters into entities for safe display.

Security & PrivacyLocal

HTML Decode

Decode HTML entities back into readable markup characters.

Security & PrivacyLocal

JWT Decode

Decode JWT header and payload locally without verifying or uploading tokens.

Security & PrivacyLocal

Password Generator

Generate strong random passwords locally with browser crypto for accounts, test users and vaults.

Security & PrivacyLocal

SHA-256 Checksum Generator

Create SHA-256 hashes for text verification, checksums and integrity comparisons in the browser.

Security & PrivacyLocal

JWT Encoder

Create an unsigned JWT-style header and payload for demos and documentation only.

Security & PrivacyLocal

Binary to Text

Decode binary byte groups into text.

Security & PrivacyLocal

Text to Binary

Convert text into 8-bit binary groups.

Security & PrivacyLocal

Hex to Text

Decode hexadecimal byte values into readable text.

Security & PrivacyLocal

Text to Hex

Convert text into hexadecimal byte values.

Security & PrivacyLocal

Decimal to Binary

Convert decimal numbers into binary values.

Security & PrivacyLocal

Binary to Decimal

Convert binary numbers into decimal values.

Security & PrivacyLocal

Hex to Decimal

Convert hexadecimal numbers into decimal values.

Security & PrivacyLocal

Decimal to Hex

Convert decimal numbers into hexadecimal values.

Security & PrivacyLocal

Passphrase Generator

Generate memorable multi-word passphrases for secure logins and recovery workflows.

Security & PrivacyLocal

Password Strength Checker

Check password length, character variety and common weakness signals without sending it anywhere.

Security & PrivacyLocal

Basic Auth Header Generator

Create HTTP Basic Authorization headers from a username and password for API testing.

Security & PrivacyLocal

CORS Header Generator

Generate common CORS response headers for frontend API development and browser debugging.

Security & PrivacyLocal

CSP Header Generator

Generate a starter Content Security Policy header to harden websites and reduce XSS risk.

Security & PrivacyLocal

Fake Email Generator for Testing

Generate safe non-receiving example email addresses for QA, seed data, forms and demos.

Security & PrivacyLocal

Test Card Number Generator

Generate sandbox-only Luhn-valid card numbers for payment form development and QA.

Security & PrivacyLocal

Luhn Validator

Check whether a number passes the Luhn checksum locally without validating a real card account.

Security & PrivacyLocal

Email Alias Ideas Generator

Create practical email alias ideas for testing, support routing and inbox organization.

Security & PrivacyLocal

Disposable Email Safety Checker

Check email syntax and common disposable-domain signals locally for signup QA and moderation notes.

Security & PrivacyLocal

Security & Privacy Guides and Cheat Sheets

JWT ecosystem / Guide

JWT Explained: Header, Payload, Signature and Claims

Understand how JSON Web Tokens work, what JWT decoding means, and which claims developers should inspect first.

Encoding ecosystem / Guide

Base64 Explained for Developers

Learn what Base64 encoding is, where it appears, why URL-safe Base64 exists and why it is not encryption.

API ecosystem / Tutorial

API Testing Guide for Browser-Based Workflows

How to test REST APIs in the browser, inspect JSON responses, handle headers and understand CORS proxy tradeoffs.

Developer ecosystem / Glossary

Developer Tools Glossary

Short definitions for JSON, YAML, JWT, Base64, regex, UUID, hashing, CORS, CSP, Open Graph and schema markup.