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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

  1. 1Select a preset (Excel CSV, TSV, or Custom).
  2. 2Upload multiple files (`.csv`, `.tsv`, `.txt`).
  3. 3Run batch conversion and inspect per-file results (including neutralized cell counts).
  4. 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

Related tools

CSV Inspector
Inspect delimiter and broken rows before batch conversion.
CSV to ICS Converter
Turn the normalized CSV into calendar events.
CSV Delimiter Detector
Confirm separators in source files before choosing a preset.

Workflows (kits)

CSV Debug Kit
A practical CSV troubleshooting and normalization workflow.