File & Data Tools
Inspect, hash, encode and transform local files and tabular data without uploading them. 18 tools are currently live in this section.
File Size Checker
Inspect the exact byte, KB and MB size of a local file without uploading it.
Open tool →File SHA-256 Checksum
Calculate the SHA-256 checksum of a local file with the browser Web Crypto API.
Open tool →File SHA-384 Checksum
Calculate a SHA-384 checksum for a local file without sending the file to a server.
Open tool →File SHA-512 Checksum
Calculate a SHA-512 checksum for a local file directly on your device.
Open tool →File to Base64 Encoder
Encode a local file as Base64 or a data URL in your browser.
Open tool →Base64 to File Decoder
Decode Base64 text into a downloadable file with a filename and MIME type you choose.
Open tool →Text File Creator
Create and download a UTF-8 text file from text you enter in the browser.
Open tool →File Type Checker
Inspect a local file name, browser-reported MIME type and extension without uploading it.
Open tool →CSV Row Counter
Count CSV rows while respecting quoted fields and embedded commas.
Open tool →CSV Column Counter
Count columns in a CSV file or pasted CSV and report the header names.
Open tool →CSV to TSV Converter
Convert comma-separated data to tab-separated values while preserving quoted fields.
Open tool →TSV to CSV Converter
Convert tab-separated rows into standards-friendly CSV with proper quoting.
Open tool →Remove Duplicate CSV Rows
Remove repeated CSV data rows while keeping the first copy and preserving the header.
Open tool →CSV Sort by Column
Sort CSV rows by a selected zero-based column number while keeping the header first.
Open tool →CSV Column Extractor
Extract one CSV column by number and return its values as a clean list.
Open tool →CSV Row Filter
Filter CSV rows by text contained in a selected column while retaining the header.
Open tool →JSON File Validator
Choose a local JSON file and validate its syntax without uploading it.
Open tool →JSON File Prettifier
Format a local JSON file with readable indentation and download the prettified result.
Open tool →About File & Data Tools
Inspect, hash, encode and transform local files and tabular data without uploading them. MediaZuno groups closely related utilities together so you can move between tasks without hunting across different websites.