- 1Choose file
- 2Adjust
- 3Download
CSR Generator & Decoder online, free
Generate Certificate Signing Requests locally or decode existing PEM CSRs.
- Runs in your browser — no upload
- Free, no sign-up, no watermark
- TXT
How to use CSR Generator & Decoder · CSR Generator & Decoder — frequently asked questions
How to use CSR Generator & Decoder
- 1
Add your TXT file
Drop a file on the page, paste it, or click Select Files. Nothing is uploaded — it opens straight in your browser.
- 2
Fine-tune the settings
Set key type & length in the Fine-tune panel, or keep the defaults — they suit most files.
- 3
Run CSR Generator & Decoder
Press the start button. Processing happens on your device, usually in seconds.
- 4
Download the result
Save the finished file, or continue with another tool without downloading in between.
What CSR Generator & Decoder can do
- Key Type & Length: rsa2048, rsa4096, ecdsa p256 and ecdsa p384
- Private by design — files are processed in your browser and never uploaded
- Free with no sign-up, no watermark and no daily limit
CSR Generator & Decoder — frequently asked questions
What is a Certificate Signing Request (CSR)?
A CSR is an encoded block of text containing domain details, organization metadata, and a public key submitted to a Certificate Authority (CA) to obtain an SSL/TLS certificate.
Is it safe to generate private keys in this browser tool?
Yes. Private keys are generated locally via the browser's native Web Crypto API. Private keys are never uploaded or transmitted to any server.
Which key algorithms are supported?
The tool supports standard RSA (2048-bit and 4096-bit) and modern elliptic curve cryptography (ECDSA P-256 and P-384).
Can this tool decode an existing PEM CSR?
Yes. Paste any standard `-----BEGIN CERTIFICATE REQUEST-----` block to inspect the Common Name, Organization, Subject Alternative Names (SANs), and public key algorithm.
Are generated certificates and keys stored by Sada Files?
No. Once you close your browser tab or clear the screen, your keys and generated CSRs are destroyed. Sada Files retains zero keys or logs.
Related tools
- SSL & TLS Certificate InspectorInspect SSL/TLS certificates, expiry dates, Certificate Authorities (CA), Subject Alternative Names (SANs), and TLS versions.
- Bcrypt Generator & VerifierGenerate cryptographically secure salted Bcrypt password hashes and verify plaintext passwords against existing hashes.
- File Checksum (MD5 / SHA)MD5, SHA-1, SHA-256 and SHA-512 computed on your device; paste a hash to verify.
- Compare Two FilesByte-wise comparison with the first differing offset.
- CRC32 Checksum CalculatorCalculate standard 8-character IEEE 802.3 CRC32 checksums from text strings or binary files.
- HMAC Generator & CalculatorCompute Keyed-Hash Message Authentication Codes (HMAC) using secret keys across SHA-256, SHA-512, and SHA-1.
- Keccak-256 Hash GeneratorCompute Web3 and Ethereum-compatible Keccak-256 cryptographic hashes from text strings or hexadecimal byte arrays.
- MD5 Hash Reverse DecryptorReverse lookup 32-character MD5 hashes to identify the original plain text using client-side wordlists.