Spreadsheet Locker – UK Edition

Welcome to the Spreadsheet Locker Knowledge Base – your all‑in‑one resource for keeping spreadsheet files safe while you work. This guide walks you through adding password protection to a wide range of file types, so your sensitive data stays confidential and out of unauthorised hands. Whether you’re dealing with everyday business reports, detailed analytical models, or more obscure formats, Spreadsheet Locker offers a smooth, user‑friendly experience that fits naturally into your workflow. By following the steps below you’ll learn how to turn any supported input file into a password‑protected spreadsheet, giving you peace of mind that your information is encrypted and guarded by a password of your choosing.

Supported Input Formats

Spreadsheet Locker accepts an extensive list of file types, so you can protect files no matter how they were originally created or stored. The platform can ingest any of the following formats:

Excel: Xlsx, Xlsb, Xlsm, Xltm, Xlam, Excel97‑2003, Excel95, SpreadsheetML, Xlt
Plain‑text: Csv, Tsv
Database / scripts: SqlScript
Data interchange: Dif, Xml, Json
Other: Epub, Azw3, Html, MHtml

This flexibility means you can bring in data from modern Office suites, legacy Excel versions, plain‑text delimited files, database scripts, markup languages, e‑book formats, and even structured JSON files. Spreadsheet Locker parses the content intelligently, preserving structure and data integrity throughout the protection process.

Resulting Protected Formats

Once you’ve set a password, the output is generated in one of the widely‑supported, password‑enabled spreadsheet formats:

Xlsx
Xlsb
Xlsm
Xltm
Xlam
Excel97‑2003

Choose the format that best matches your compatibility needs and preferred features. All of these support robust encryption standards and are recognised by virtually every major spreadsheet programme, ensuring that the locked file can be opened by colleagues or clients – provided they have the correct password.

How to Protect Your Files

Upload Your Document – Drag‑and‑drop or browse to select the input file from the supported list. The system auto‑detects the file type and shows a preview of the data.
Set a Strong Password – Enter a password that meets your organisation’s policy (minimum length, mixed characters, etc.). You’ll be asked to confirm it to avoid typographical errors.
Choose the Output Format – Pick the protected format that fits your downstream workflow. If you’re unsure, the default Xlsx offers broad compatibility and strong encryption.
Enable Additional Options (Optional) – You can lock specific worksheets, hide formulas, or restrict editing permissions, giving you granular control over how the file can be used once opened.
Generate the Protected File – Click “Protect” and let Spreadsheet Locker do the rest. Within seconds you’ll receive a downloadable file that is fully encrypted and ready for secure distribution.

Why Use Spreadsheet Locker?

Benefit	What it Means for You
Universal Compatibility	Works with both modern and legacy spreadsheet formats, as well as non‑spreadsheet data sources.
Robust Encryption	Uses industry‑standard algorithms to safeguard your data against unauthorised access.
Ease of Use	Intuitive interface requires no technical expertise; password protection can be applied in just a few clicks.
Compliance‑Ready	Helps you meet GDPR and other data‑protection regulations by ensuring sensitive information is encrypted at rest.
Flexible Output	Choose from multiple protected formats to align with existing document‑management policies.

Next Steps

Dive deeper into the sections below for detailed tutorials, best‑practice recommendations, and troubleshooting tips to make the most of your data‑protection strategy. With Spreadsheet Locker, you can confidently protect your spreadsheets and related files, knowing you have a reliable, UK‑friendly solution from input right through to a securely encrypted output.