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    SHA-256 Hash Generator

    Compute SHA hashes and HMACs for text or files and verify checksums without uploading anything.

    Hashes

    Type text or drop a file to compute SHA-256 and other hashes.

    HMAC

    Verifying a JWT signed with HS256? Use the JWT Decoder.

    Verify

    Options
    Algorithms
    Output
    Runs in your browser — your text, files and keys are not uploaded.

    How to use

    1. Type or paste your text into the Text tab.
    2. Select SHA-256 or the other algorithms you need.
    3. Set Output to hex, HEX or Base64.
    4. Click Copy all to copy the selected hashes.

    Examples

    Check a standard SHA-256 test vector

    Input
    abc
    Output
    SHA-256: ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad

    Create an HMAC-SHA-256 for a sample webhook

    Input
    {"event":"order.paid","order_id":"ORD-1042","amount_usd":"49.95"}
    Output
    HMAC-SHA-256: 90b26d31f40f92cea8194b6d7d28876b17377dbfcd8584a6eb8a54b85ede7bf7

    Verify the checksum of an empty file

    Input
    empty.txt (0 bytes)
    Output
    Match ✓ SHA-256

    FAQ

    How do I verify a downloaded file's SHA-256 checksum?

    Select SHA-256, open the File tab and click Choose files. Paste the checksum from the download page into Expected hash to check for a match. You can also paste a full sha256sum line containing the checksum and filename.

    Can I decrypt a SHA-256 hash?

    A hash is a one-way fingerprint, not encryption. This tool computes hashes; it cannot turn a hash back into the original text.

    Why does the same text produce a different hash?

    Spaces and a trailing line break change the bytes being hashed. For multiline UTF-8 text, check Line endings: LF (\n) and CRLF (\r\n) produce different hashes.

    Are my text, files or secret keys uploaded?

    Hashing happens in your browser, and the tool does not upload your text, files or keys. Only algorithm, format and encoding options are saved locally. The page uses Google Analytics for usage events, without including your text, key or filename.

    How large a file can I hash?

    You can add up to 20 files at a time, each up to 4 GB. Text input is limited to 50 MB; use the File tab for larger inputs.

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