Encoding, CSV and Text Tools
Repair a garbled CSV for Excel, re-encode Shift_JIS as UTF-8, normalise line endings, turn CSV into JSON — the text chores that come up at work, with no sign-up and no install. Every tool runs entirely inside your browser, so confidential files stay on your machine.
Character encoding
CSV & tabular data
Text formatting
Why use these tools
No upload
Files are processed inside your browser and never sent to a server, so confidential documents stay on your machine.
No sign-up, no install
Open the page and start working. There are no accounts, no usage limits and nothing to pay for.
Built for Japanese encodings
Shift_JIS, EUC-JP and ISO-2022-JP are first-class citizens, as is repairing CSV files that Excel garbles.
Frequently asked questions
Are my files uploaded?
No. Every conversion runs as JavaScript inside your browser. File contents never cross the network, and the page keeps working offline once loaded.
Is it free? Do I need an account?
Every tool is free with no sign-up and no install. There are no conversion or file-size limits beyond your browser’s memory.
My CSV is garbled in Excel — which tool do I need?
Use the CSV mojibake tool. It detects the encoding and writes UTF-8 with a BOM, which Excel opens correctly.
Does it work on a phone?
Yes, it works the same way in mobile browsers on iOS and Android, including the file picker.