Base64 Encoder
Encode plain text to Base64 instantly.
Open Base64 Encoder
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Frequently asked questions
Common questions about this tool.
SHA-1 is a 160-bit cryptographic hash algorithm that outputs a fixed digest regardless of input size.
SHA-1 is deprecated for many security uses due to practical collision attacks; newer systems should use SHA-256 or better.
Mainly legacy compatibility, such as older systems or identifiers where security strength is not the primary requirement.
SHA-1 produces 160 bits, typically shown as 40 hexadecimal characters.
No. Hashing is one-way, but weak inputs can still be guessed via brute-force or dictionary methods.
Yes. Leading/trailing spaces, tabs, and line breaks are part of the input and change the hash.
Some integrations still require it for backward compatibility, but new security designs should avoid it.
SHA-256 has a larger digest and stronger security properties; SHA-1 is older and collision resistance is considered insufficient.
Yes for typical browser workloads; very large inputs may take longer depending on device performance.
Yes. The tool computes SHA-1 in-browser without sending your text to a server.