Base64 Encoder/Decoder
PopularEncoders & Crypto
Encode and decode text to Base64 — handy for headers and data URLs.
Encoders & Crypto
Encode and decode Base64, URL, HTML entities, JWT tokens, hashes, UUIDs, and passwords.
Encoding and crypto utilities for tokens, headers, identifiers, and hashes. Decode a JWT payload during auth debugging, generate a UUID for fixtures, or hash a string to compare with a stored digest.
These tools use browser-native APIs like Web Crypto and btoa/atob. Secrets stay on your device — use test credentials when you can and avoid pasting production keys into any browser tool.
- Base64, URL, and HTML entity encoding/decoding
- JWT decode and HMAC-signed token generation
- Hashing, UUIDs, passwords, and AES encryption helpers
Tools in this category
16Base32 Encoder/Decoder
Encoders & Crypto
Encode and decode Base32 (RFC 4648) strings.
Base58 Encoder/Decoder
Encoders & Crypto
Encode and decode Base58 (Bitcoin/IPFS alphabet) strings.
TOTP / 2FA Code Generator
PopularEncoders & Crypto
Generate time-based one-time passwords (TOTP) from a Base32 secret.
URL Encoder/Decoder
Encoders & Crypto
Encode and decode URL-encoded strings.
HTML Entity Encoder/Decoder
Encoders & Crypto
Encode and decode HTML entities.
JWT Decoder
PopularEncoders & Crypto
Split a JWT into header and payload. Decode only — does not verify signatures.
JWT Generator
PopularEncoders & Crypto
Sign test tokens with HS256, HS384, or HS512. Use test secrets only.
JWT Verifier
PopularEncoders & Crypto
Verify JWT signatures (HS256/384/512) and check expiry locally.
Hash Generator
Encoders & Crypto
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes.
UUID Generator
Encoders & Crypto
Generate random UUID v4 and v1 identifiers.
Password Generator
Encoders & Crypto
Generate secure random passwords with custom options.
Slug Generator
Encoders & Crypto
Convert text to URL-friendly slugs.
HMAC Generator
Encoders & Crypto
Generate HMAC-SHA256, SHA384, and SHA512 message authentication codes.
AES Encrypt / Decrypt
Encoders & Crypto
Encrypt and decrypt text with AES-256-GCM using a password (client-side).
Image to Base64
Encoders & Crypto
Convert images to Base64 data URLs for embedding in HTML or CSS.