# File Hash Verifier Calculate MD5/SHA1/SHA256 hash values for files and verify against expected hashes > Canonical page: https://elysiatools.com/en/tools/file-hash-verifier - **Category:** Utilities - **Keywords:** hash, md5, sha1, sha256, checksum, verify, file, integrity, security ## Overview The File Hash Verifier is a secure utility designed to calculate MD5, SHA1, and SHA256 checksums for any file, ensuring data integrity and verifying that your files have not been tampered with or corrupted during transfer. ## Inputs - **Select File** (file) - **Hash Algorithm** (select) - **Expected Hash (Optional)** (text): Enter expected hash value for verification... ## When to use - Confirming that a downloaded software installer is authentic and unmodified. - Verifying that a file was transferred or copied without data corruption. - Checking if two files are identical by comparing their unique cryptographic signatures. ## How it works - Upload the file you wish to analyze using the file selector. - Select your preferred hashing algorithm (MD5, SHA1, or SHA256) from the dropdown menu. - Optionally, paste the expected hash string into the verification field to automatically compare it against the calculated result. - View the generated hash value and the verification status immediately on the screen. ## Use cases - Validating software downloads from official developer websites. - Ensuring the integrity of sensitive documents after cloud storage synchronization. - Detecting unauthorized modifications to system configuration files. ## Frequently asked questions ### What is a file hash? A file hash is a unique string of characters generated by an algorithm that acts as a digital fingerprint for a specific file. ### Which algorithm should I choose? SHA256 is recommended for most modern security needs, while MD5 and SHA1 are often used for legacy compatibility or quick integrity checks. ### Is my file uploaded to a server? The file is processed to calculate the hash, but it is not stored or shared with third parties. ### What happens if the hashes do not match? A mismatch indicates that the file has been altered, corrupted, or is not the original version you intended to download. ### Is there a file size limit? Yes, the tool supports files up to 10MB for processing. ## Related tools - [Audio Hash](https://elysiatools.com/en/tools/audio-hash): Generate cryptographic hashes (checksums) for audio files - [Checksum Comparator](https://elysiatools.com/en/tools/checksum-comparator): Compare two checksums/hash values to check if they match - [Hash Generator](https://elysiatools.com/en/tools/hash-generator): Generate hash values (MD5, SHA1, SHA256, SHA512) - [Hash Algorithm Comparator](https://elysiatools.com/en/tools/hash-algorithm-comparator): Hash the same input with MD5, SHA-1, SHA-256, SHA-512, BLAKE2b, and BLAKE3 at the same time and compare them side by side: output length, hex/Base64 digest, security status (broken / modern), and a relative speed benchmark. Great for teaching, choosing a hashing algorithm, or sanity-checking checksums. - [Text Hash Generator](https://elysiatools.com/en/tools/text-hash-generator): Compute MD5, SHA-1, SHA-256, SHA-512, and CRC-32 hashes of any text in one shot. Get both hex and Base64 digests over the UTF-8 encoding. - [Excel to Markdown Converter](https://elysiatools.com/en/tools/excel-to-markdown): Convert Excel file to Markdown table format, extracting data from the first worksheet - [Thyroid Index (TSH/FT4/FT3 Interpretation)](https://elysiatools.com/en/tools/thyroid-index): Interpret the thyroid axis by pattern-reading TSH with FT4 and (optionally) FT3. Adult reference ranges: TSH 0.4–4.0 mIU/L, FT4 0.8–1.8 ng/dL (≈10–23 pmol/L), FT3 2.3–4.2 pg/mL (≈3.5–6.5 pmol/L). High TSH + low FT4 → overt primary hypothyroidism; high TSH + normal FT4 → subclinical hypothyroidism; low TSH + high FT4/FT3 → overt primary hyperthyroidism; low TSH + normal FT4 → subclinical hyperthyroidism, exogenous hormone, or resolving thyroiditis (check FT3 for T3 toxicosis); low/normal TSH + low FT4 → central hypothyroidism; high TSH + high FT4 → TSH-secreting adenoma or thyroid hormone resistance. Low FT3 with normal TSH/FT4 indicates low-T3 (non-thyroidal illness) syndrome. Units selectable for TSH, FT4, FT3. Derived from ATA 2014/2016, NACB 2002, Garber 2012, and MDCalc. Not medical advice. - [Bcrypt Validator](https://elysiatools.com/en/tools/bcrypt-validator): Validate password against bcrypt hash ## Samples - [Android Image Processing Java Samples](https://elysiatools.com/en/samples/android-image-processing-java): Android Java image processing examples including reading/saving images, scaling, and format conversion - [Android Image Processing Kotlin Samples](https://elysiatools.com/en/samples/android-image-processing-kotlin): Android Kotlin image processing examples including reading/saving images, scaling, and format conversion - [Web Image Processing Python Samples](https://elysiatools.com/en/samples/web-image-processing-python): Web Python image processing examples using PIL/Pillow including reading, saving, resizing, and format conversion - [Web Image Processing Rust Samples](https://elysiatools.com/en/samples/web-image-processing-rust): Web Rust image processing examples including image read/save, scaling, and format conversion ## Related content - [PDF Signature Verification and File Integrity Evidence](https://elysiatools.com/en/hubs/pdf-signature-verification-workflows): Preserve the original PDF hash, compare it with a trusted reference checksum, verify embedded signatures, and record certificate-chain findings without treating tool output as legal validity or proof of signer identity. - [Detached Signature and File Integrity Verification](https://elysiatools.com/en/hubs/detached-signature-and-file-integrity-verification): Generate or reproduce a file hash, compare it with a published checksum, and verify a detached Ed25519 signature with a separately trusted public key. - [Binary Encoding, File Forensics, and Integrity Tools](https://elysiatools.com/en/hubs/binary-encoding-file-forensics-integrity): Inspect bytes and signatures, identify file types, measure entropy, and verify hashes or checksums in one safe forensic workflow.