CSR Decoder
CSR Decoder
Paste a PKCS#10 CSR (PEM or Base64 DER) - subject, public key, extensions, attributes and fingerprints are decoded with a pure-JavaScript ASN.1 parser and verified with the Web Crypto API, entirely in your browser.
| Extension | Critical | Value |
|---|
| Attribute | Value |
|---|
---How to use CSR Decoder
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What is the CSR Decoder?
The CSR Decoder is a free online tool designed to help you get things done quickly and efficiently. It runs entirely in your browser — no software to download, no account to create.
How to Use
- Enter your input — paste text, upload a file, or fill in the required fields.
- Run the tool — click the action button to process your input.
- Get results — copy or download the output with one click.
Key Features
- 100% free — no hidden fees, no watermarks, no usage limits.
- Private & secure — processing happens locally in your browser when possible.
- Lightning fast — get results in seconds, not minutes.
- Works everywhere — compatible with desktop, tablet, and mobile browsers.
- No signup required — start using the tool immediately, no account needed.
Tips for Best Results
- Double-check your input for accuracy before running the tool.
- Bookmark this page for quick access next time.
- Share this free tool with friends and colleagues who might find it useful.
Frequently Asked Questions
Is this tool really free?
Yes, the CSR Decoder is completely free to use with no hidden charges or premium tiers for basic usage.
Do I need to create an account?
No signup required. You can use the tool immediately without creating an account or providing any personal information.
Is my data safe?
Yes. Whenever possible, processing happens entirely in your browser, meaning your files and data never leave your device.
Frequently Asked Questions
What is the CSR Decoder?
The CSR Decoder is a free online tool for encoding, decoding, or transforming data. It processes everything in your browser for privacy and speed.
Is the CSR Decoder free to use?
Yes, the CSR Decoder is completely free to use. There are no hidden fees, no premium tiers for basic usage, and no watermarks on your results.
How do I use the CSR Decoder?
Enter your input in the provided field, adjust settings if needed, and click the action button. Results appear instantly in your browser.
Is my data secure?
Yes. All processing happens locally in your browser. Your data never leaves your device, ensuring complete privacy and security.
Does the CSR Decoder work on mobile?
Yes, the CSR Decoder works on all modern browsers including desktop, tablet, and mobile devices. No app installation is required — just open your browser and start using the tool.