Why should I generate checksums when archiving documents?

A checksum taken at archive time creates a tamper-evident baseline. If the file is later retrieved and its hash no longer matches, you know it was altered or corrupted. This is a standard requirement in legal, financial, and government records management.

Which hash algorithm is best for long-term document archives?

SHA-256 is the current standard for long-term integrity verification. MD5 should be avoided for security-sensitive archives due to known collision vulnerabilities. SHA-512 provides additional margin if your retention policy requires it.

Can I hash a batch of documents all at once?

Yes. Upload up to 50 files per batch (or 2GB total). Each file receives its own section in the output report, making it easy to match checksums to individual archived records.

What file formats are supported?

PDF (up to 300MB), DOCX (up to 50MB), XLSX/XLS (up to 200MB), CSV (up to 500MB), TXT, PNG, JPG, JPEG, WEBP, ZIP, and JSON are all supported.

Does the tool store my files after hashing?

Files are processed server-side and held in temporary storage only for the duration of processing. They are not retained after your session ends.

Prove Archived Document Integrity with Cryptographic Checksums

Long-term document archives are only trustworthy if you can prove a file hasn't changed since it was stored. Deliteful's File Hash Checker generates MD5, SHA-1, SHA-256, and SHA-512 checksums for uploaded documents, giving records managers a verifiable integrity baseline they can revisit for audits or legal holds.

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Document archiving best practice — and in many cases regulatory requirement — calls for hash-based integrity verification at the point of ingestion. Without a checksum taken at archive time, there is no way to prove later that a record wasn't altered, corrupted by storage media decay, or inadvertently overwritten. This matters for legal holds, financial audits, public records compliance, and any retention policy that requires demonstrable chain of custody.

Deliteful supports all major document formats used in archival workflows: PDF (up to 300MB), DOCX (up to 50MB), XLSX and XLS (up to 200MB), CSV (up to 500MB), images, and more. The output is a plain-text checksum report that names each file and lists its hash values — straightforward to store alongside the archived file or attach to a records management system entry. Batch processing handles up to 50 files per run.

How it works

1
Sign in with Google
Create your free Deliteful account with Google OAuth — no credit card, takes under a minute.
2
Upload your documents for archiving
Add PDFs, DOCX files, spreadsheets, images, or other supported formats in bulk.
3
Select hash algorithms
Choose SHA-256 for standard integrity verification, or add MD5 and SHA-512 for multi-algorithm audit trails.
4
Generate the checksum report
Deliteful computes all selected hashes in a single pass and returns a plain-text report.
5
Store the report with your archive
Save the checksum report alongside the archived files as your integrity baseline for future audits.

Frequently asked questions

Why should I generate checksums when archiving documents?: A checksum taken at archive time creates a tamper-evident baseline. If the file is later retrieved and its hash no longer matches, you know it was altered or corrupted. This is a standard requirement in legal, financial, and government records management.
Which hash algorithm is best for long-term document archives?: SHA-256 is the current standard for long-term integrity verification. MD5 should be avoided for security-sensitive archives due to known collision vulnerabilities. SHA-512 provides additional margin if your retention policy requires it.
Can I hash a batch of documents all at once?: Yes. Upload up to 50 files per batch (or 2GB total). Each file receives its own section in the output report, making it easy to match checksums to individual archived records.
What file formats are supported?: PDF (up to 300MB), DOCX (up to 50MB), XLSX/XLS (up to 200MB), CSV (up to 500MB), TXT, PNG, JPG, JPEG, WEBP, ZIP, and JSON are all supported.
Does the tool store my files after hashing?: Files are processed server-side and held in temporary storage only for the duration of processing. They are not retained after your session ends.

Create your free Deliteful account with Google and start generating integrity checksums for your document archive today.