Spreadsheets & Data
Fix garbled CSV encodings, remove duplicates, compare sheets and convert formats — tools to tidy data without breaking it.
9 tools
CSV Encoding Fix
Convert CSV files that show garbled text in Excel to UTF-8 with BOM or Shift_JIS, with automatic encoding detection. Mojibake that was already saved, such as “日本語”, can usually be restored too.
CSV Studio
Open CSV files that are slow or garbled in Excel and view, search and edit them right away in your browser. Combine, split and save as CSV (UTF-8 with BOM, Shift_JIS), Excel or JSON on one screen.
CSV, JSON, XML & Excel Converter
Convert between CSV, TSV, JSON, JSON Lines, XML and Excel (.xlsx) by pasting or opening a file. Values stay as text by default, so zero-padded postal codes, phone numbers and long IDs are never changed. Everything runs in your browser; your data is not uploaded.
Data Health Check
Open a CSV or Excel table to get a list of problems — blanks, duplicates, spelling variants, garbled text and more — ranked by severity, a 0–100 health score and a profile of every column. Click a finding to see the affected rows; fixable problems link to the right tool.
Excel Cleanup
Tick what to fix and clean up spaces, character widths, dates and numbers across a whole Excel or CSV file at once. Changed cells are highlighted, and you can save as Excel or CSV.
Excel Compare
Load an old and a new Excel or CSV file to see added, removed and changed rows, with every changed cell shown as “old → new”. Save the result as a colour-coded Excel report or CSV.
Excel Deduplicate
Find duplicate rows in an Excel or CSV file by the columns you choose, ignoring the variations you choose, then remove them or merge each group into one row. Review every group, change which row survives, and save as Excel or CSV.
Excel Merge
Combine sheets from several Excel or CSV files: stack their rows into one table, or keep them as separate sheets in one workbook. Columns are aligned by header name automatically.
SQL Studio — Format, Analyze & Convert
Paste SQL to format, minify or analyze it for your dialect. Strings and comments are never altered, UPDATE/DELETE without WHERE and DROP are flagged, and value lists or CSV rows become IN clauses and INSERT statements — all on your device.