File Tools
Free Online File Conversion & Management Tools
Last updated: September 16, 2026
Browse All File Tools
Free File Tools for Documents & Data
Spreadsheets, archives, renames & conversions — no uploads.
Spreadsheets arrive as CSV and need to leave as Excel. A folder of downloads needs one ZIP. Five hundred photos need sane filenames. These free file tools convert CSV to Excel and back, translate CSV to JSON for developers, build ZIP archives, rename batches, and turn text into PDF — free, no signup, up to 200MB per file.
Data files deserve the same privacy as documents: every conversion here runs 100% in your browser, so salary sheets, client lists, and research data never travel to a server. The one exception is legacy DOC-to-DOCX conversion, which needs one-time secure server parsing and is deleted immediately — everything else never leaves your device.
Pick the transformation and the tool handles the format details: UTF-8 CSV quirks for Google Sheets, modern XLSX output Excel opens cleanly, ZIP archives with real compression levels, and pattern-based renaming with live previews. Each tool page documents limits, edge cases, and what to do when a file misbehaves.
Developer Formats
CSV ↔ JSON both directions with validation, plus Base64 and text utilities for web work.
Archives & Names
Create ZIP files with compression levels and target sizes, or bulk-rename hundreds of files by pattern.
Documents
Draft in plain text and publish with TXT to PDF, or modernize legacy Word files.
Frequently Asked Questions
Are these file tools really free?
Yes — all file tools are 100% free with no signup, no watermarks, and files up to 200MB. Clearly labeled display ads keep them free.
Is my spreadsheet data uploaded anywhere?
No. Conversions run entirely in your browser, so salary data, client lists, and research never leave your device.
Will Excel open the converted files correctly?
Yes — output uses standard XLSX and UTF-8 CSV that Excel, Google Sheets, and LibreOffice all open cleanly, including special characters.
What is the file size limit?
Up to 200MB per file for file tools (less on low-memory phones, where limits adapt to protect your browser).