⚡ 100% Free Online • Browser Math Engine

Online Calculators, Converters & File Checksum

Convert digital storage, length and mass units, calculate Unix epoch timestamps, compute compound financial interest, and verify file integrity hashes with 0 server storage!

✓ 100% Free Forever ✓ Zero Server Storage ✓ High-Precision Math ✓ Multi-GB File Hashing

Multi-Metric Unit Converter

Convert digital storage (Bytes, KB, MB, GB, TB), length, and mass units with real-time decimal precision.

Category:

Input Value:

From Unit:

To Unit:

Unix Timestamp (Epoch) Converter

Translate raw Unix epoch seconds or milliseconds into human-readable local time and UTC formats.

Current Unix Epoch:

Unix Timestamp (seconds or milliseconds):

Compound Interest & Loan Amortization

Calculate future investment value and monthly loan repayments based on principal amount, interest rate, and years.

Principal Amount ($):

Annual Interest Rate (%):

Time Period (Years):

File Integrity & Checksum Verifier

Calculate SHA-256, SHA-512, or MD5 hashes of any file on your computer without uploading. Test against an expected hash to ensure file integrity.

Select a file to compute its cryptographic checksum.

Compare with Expected Hash:

Frequently Asked Questions

Yes. Toflah reads files directly from your computer's storage using HTML5 FileReader and computes the SHA-256 hash using your computer's processor. Zero bytes are uploaded to the internet.

The calculations follow standard banking formulas for annual compound interest (A = P(1 + r)^t) and standard monthly fixed-rate mortgage amortization formulas.