AES interoperability
AES-GCM payload inspector
Paste a HashyTools AES v2 JSON payload or a legacy token. This inspector reads the structure locally; it never asks for or transmits your passphrase.
Try the published test vector, then change one character in the tag or IV and inspect again.
What the inspector validates
- Version, algorithm, PBKDF2 hash and work factor.
- Salt, IV and tag sizes required by the v2 format.
- Base64URL encoding and optional authenticated data.
- Legacy GCM/CBC tokens generated by prior HashyTools versions.
Validation method reviewed August 31, 2026; parsing and validation run entirely in the browser.
A well-formed payload can still have a wrong key, altered ciphertext or an invalid authentication tag. Only decryption with the correct secret can check authenticity. The inspector never asks for that secret.
Choose a developer tool
- AES-GCM encrypt/decrypt
Protect text with AES-GCM and PBKDF2 tokens that stay on-device.
- Hash generator
Generate MD5, SHA-1, and SHA-256 digests locally with Web Workers.
- JWT verifier
Decode claims and verify HMAC signatures without network calls.
- Base64 encoder & decoder
Convert any text to or from Base64 without leaving your browser.
More tools for data, text and testing
- JSON formatter
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- XML formatter
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- Regex tester
Experiment with regular expressions and capture groups locally.
- URL encoder and inspector
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- UUID v4 generator
Create collision-resistant UUID v4 identifiers using Web Crypto.
- Secure password generator
Build strong passwords with custom length, charset, and entropy.
- Epoch time converter
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- Text transformer
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- Color converter
Switch between HEX, RGB, HSL, and Tailwind palettes instantly.
- QR code builder
Design QR codes for text, Wi-Fi, contacts, email, or SMS locally.
- Barcode maker
Generate EAN and Code 128 barcodes and download crisp PNG output.
- IP lookup
Look up your public IP using disclosed external services.
- Lorem ipsum generator
Produce paragraphs, lists, and markdown filler text fast.
Run the AES interoperability guide or read how these tools are checked.