One fingerprint per file
Know exactly
what's inside your files.
FolderManifest computes SHA-256, SHA-1, and MD5 checksums for single files or entire folder trees — locally, in bulk, with a manifest you can re-verify any time.
Free 7-day trial · No credit card · Windows, macOS & Linux
0
hashed
3
algorithms
100%
local
0
same hash
Three algorithms
SHA-256, SHA-1, and MD5 in one pass
Bulk-ready
hash files by the thousands or entire folder trees
Offline
nothing uploads — hashing happens on your machine
Scriptable
CLI with stable exit codes and JSON output
Why people hash files
A fingerprint that can't lie.
A checksum condenses every byte of a file into a short digest. Identical files, identical digest. One changed byte, completely different digest. That's the whole trick — and it's enough.
01 / DOWNLOADS
Is the file you downloaded?
Publishers publish SHA-256 hashes next to installers. Calculate yours and compare — if they differ, the file was corrupted or tampered with. Don’t run it.
02 / BACKUPS
Prove the copy is clean
A backup that silently corrupted is worse than no backup. Hash the source, hash the copy, compare manifests — byte-level proof the archive is intact.
03 / EVIDENCE
Data that holds up
Research datasets, legal holdings, audit exports — a checksum manifest dated today proves the files were exactly these bytes at this time.
How it works
Hash. Export. Prove.
1
Point at your files
Drop in a file, pick a folder, or feed the CLI a list. Local disks, USB, NAS, mounted cloud drives.
2
Hash instantly
SHA-256, SHA-1, and MD5 are computed locally in one multi-threaded pass. Nothing leaves your machine.
3
Export the manifest
Save a per-file checksum report — CSV, JSON, or HTML — and re-verify it any time to prove nothing changed.
installer.exe → 9f2c…e81b
matches publisher's hash ✓
dataset-v3.csv → 4ab7…0d3f
archived with backup · re-verified ✓
contract.pdf → c19d…77a0
differs from yesterday's manifest — review
The manifest habit
Hash today.
Verify forever.
A checksum only proves a moment. A manifest proves every moment after it: re-run verification whenever you want and see exactly which files changed, appeared, or vanished since the last run.
hash · export · re-verify · repeatOne license · Everything included
$59 once
The checksum calculator ships inside FolderManifest. No subscription, no upsells.
- Checksum calculator — SHA-256, SHA-1, MD5
- Whole-folder manifest generation
- One-click re-verification & drift alerts
- Duplicate finder with one-click undo
- CLI for scripts, schedulers & agents
30-day money-back guarantee · All features unlocked in trial
Questions
Before you hash
What is a checksum?
A checksum is a short fingerprint computed from a file’s contents. Change one byte anywhere in the file and the fingerprint changes completely. SHA-256 is the modern standard; MD5 and SHA-1 are older algorithms kept for compatibility.
Which algorithm should I use?
Use SHA-256 for anything new — verification, integrity, duplication checks. Use MD5 or SHA-1 only when an external system or older tool still requires them.
Can I checksum entire folders, not just files?
Yes. FolderManifest walks a folder tree, hashes every file, and writes a manifest — a complete checksum report you can re-verify any time to prove nothing changed.
Can I calculate checksums in bulk?
Yes. Select hundreds or thousands of files, or generate a whole-folder manifest in one run. The CLI can script it and schedule it with Task Scheduler or cron.
Is there a free online checksum calculator?
Yes — the FolderManifest Checksum Calculator runs in your browser, computes SHA-256, SHA-1, and MD5 locally, and uploads nothing. Try it free, no sign-up.
Is the checksum calculator included in the trial?
Yes. The seven-day full-access trial includes the calculator, folder manifests, integrity monitoring, duplicate finding, and the CLI. One $59 lifetime license keeps everything.
Related
Related guides & free tools
Compute a hash right now in your browser, or go deeper on algorithms and verification.
What users say
A clearer folder story, from people who use it.
“FolderManifest makes it easy to organize folder structures and manage duplicate files while keeping everything safe and secure.”
Mehedy H.Research and operations“I can understand a project folder at a glance, review what changed, and keep the cleanup process clear for everyone involved.”
Tasmina Akter C.Project coordination“FolderManifest clearly displays project structures and contents, making it easy to understand where everything is at a glance and maintain consistency across teams.”
Zahirul I.Business partnerBusiness-partner reviewFingerprints in seconds
Hash anything. Prove everything.
Single files or whole trees — get SHA-256, SHA-1, and MD5 digests plus a manifest you can re-verify forever.
No credit card · $59 once after · 30-day money-back