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Excel Column Letter Converter

Excel column name converter: convert between letters and numbers A1 AB28 XFD16384 bidirectionally with batch for spreadsheets, with one-click copy and offline.

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Enter a column letter (e.g. AB) or number (e.g. 28); the converter auto-detects the direction.

Overview

Excel Column Letter Converter is a code tool that Excel column name converter: convert between letters and numbers A1 AB28 XFD16384 bidirectionally with batch for spreadsheets, with one-click copy and offline. It runs 100% in your browser with no upload, so you get instant results with privacy. Whether you need a quick answer or batch processing with precise control, you can enter, validate and export in seconds. The UI is responsive on mobile, tablet and desktop and supports one-click copy.

Use cases

  • Convert between CSV/JSON/Markdown
  • Test regex with highlights
  • Escape code for string literals
  • Format and validate JSON
  • Use it to cross-check “excel列名、列字母转数字” in reports, docs or APIs to avoid manual conversion errors

How to use

  1. 1 Paste code/data
  2. 2 Pick action and options
  3. 3 Fix highlighted errors
  4. 4 Copy or export

Highlights

  • Local & private: processing stays in your browser
  • Live validation with tolerant parsing
  • One-click copy and export for docs, code or sheets
  • Batch and offline support under poor network

Notes

  • Disable live validation for large files
  • Strict JSON disallows comments/trailing commas
  • Watch greedy vs lazy regex

FAQ

Why invalid?
Trailing commas, single quotes or BOM often cause it.
Offline?
Yes, parsing is local.
How is Excel Column Letter Converter different?
It runs locally with a focus on speed and privacy, plus tolerant parsing for “excel列名、列字母转数字” and one-click copy for reuse.
Can I use results in official reports?
Use it as a working draft and cross-check with authoritative sources; keep the exported log and parameters for traceability.
Tip：Tip: Bookmark this page or pin the tab; find related tools via categories and search (convert → calculate → export).
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All calculations run locally in your browser; nothing is uploaded.