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CSV/TSV Batch Converter
複数CSV/TSVを一括変換します（区切り・改行・BOM・CSV式中和）。処理はブラウザ内で完結します。
Conversion Settings
No files selected
Per-file Status
ファイルを選択するとステータスが表示されます。
Security Guardrails
- ブラウザ内処理のみ（アップロードなし）
- 許可拡張子のみ受け付け（`.csv`, `.tsv`, `.txt`）
- 上限: ファイル 2MB / 5000行 / 40列
- 変換レポートCSVを同梱し、ファイル別の成功/失敗を監査しやすくする
- バイナリ混入とタイムアウト超過時は処理中断
CSV/TSV Batch Converter: Guide
- Intent
- Batch-convert CSV/TSV files with practical presets (delimiter, newline, UTF-8 BOM, and CSV formula neutralization) in your browser.
- What it does
- Processes multiple CSV-like files in one run, converts structure formatting based on a chosen profile, and packages results as a ZIP.
- Key features
- Batch queue, Per-file status table, Retry failed files, Preset + custom output rules, Encoding selection, ZIP + report CSV
- Privacy
- All conversion runs locally in your browser. Files are not uploaded.
- Best for
- Operations teams that need to normalize multiple CSV files quickly
- Workflow handoffs that require exact delimiter/newline/BOM settings
- Users handling sensitive tabular data that should stay local
- Why this tool
- Preset-first setup reduces repeated manual formatting work
- Per-file status, retry flow, and report CSV make failures auditable and recoverable
- Security guardrails are included by default
How to use
- 1Select a preset (Excel CSV, TSV, or Custom).
- 2Upload multiple files (`.csv`, `.tsv`, `.txt`).
- 3Run batch conversion and inspect per-file results (including neutralized cell counts).
- 4Download the converted outputs as ZIP.
Common mistakes
- Custom encoding in v1 supports UTF-8 and UTF-16 LE only.
- Providing very large files that exceed local safety limits.
- Using wrong preset for the target system (check delimiter/newline requirements first).
Examples
Excel-ready CSV batch
Preset: Excel CSV
Output: comma + CRLF + UTF-8 BOM
Use case: prepare imports for spreadsheet workflows
TSV normalization
Preset: TSV LF
Output: TAB + LF + no BOM
Use case: backend or Unix-oriented pipelines