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CSV Tools

View, edit, validate, and convert CSV, TSV, and JSON data.

CSV WorkspaceView, edit, validate, clean, and export CSV or TSV data privately in your browser. CSV to JSONConvert CSV to JSON online with header, delimiter, object, and array options. JSON to CSVConvert JSON arrays or objects to downloadable CSV data in your browser.

Every TextLumo tool runs locally in your browser.

About this collection

Work with CSV data without uploading it.

Open and inspect CSV or TSV files, fix tabular data, and convert between CSV and JSON with focused tools that run entirely in your browser. Quoted fields, embedded commas, line breaks, and common delimiters are handled locally.

These CSV tools are useful for spreadsheet exports, API payloads, analytics data, product catalogs, database imports, and quick format changes between development and business workflows.

Private by default: processing happens locally on your device, so pasted text is not uploaded to TextLumo.

TextLumo toolkit

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Word Counter Count words, characters, sentences, lines, and reading time. Text Tools Case Converter Switch between sentence, title, upper, lower, and code cases. Text Tools Line Organizer Deduplicate, sort, or add a prefix and suffix to every line. List Tools Text Diff Compare two versions by line or word and highlight every change. Text Tools Social Character Counter Check text length against popular social platform limits. SEO Tools Text Cleaner Remove extra spaces, line breaks, and empty lines. Text Tools Find & Replace Find and replace text with case-sensitive or regex matching. Text Tools Join & Split Text Join lines or split text using any delimiter. List Tools List Compare Find shared and unique items across two lists. List Tools CSV & Column Tools Convert lists and CSV or extract a delimited column. Conversion Tools HTML & Text Converter Convert HTML to plain text or text into clean HTML paragraphs. Conversion Tools HTML & Markdown Converter Convert common Markdown and HTML structures in either direction. Conversion Tools Data Extractor Extract URLs, email addresses, or phone numbers from text. Conversion Tools Unicode Converter Inspect, escape, and decode Unicode characters and code points. Developer Tools SEO Content Analyzer Review keyword density, readability, and writing statistics. SEO Tools Meta Tag Checker Check title and description lengths with a search preview. SEO Tools URL Slug Generator Turn titles into clean, readable URL slugs. SEO Tools Lorem Ipsum Generator Generate placeholder paragraphs for layouts and drafts. SEO Tools Text to Speech Read text aloud using voices available in your browser. Conversion Tools JSON Formatter Format, validate, search, and inspect JSON as code, a tree, or a virtualized table in your browser. Developer Tools CSV Workspace View, edit, validate, clean, and export CSV or TSV data privately in your browser. CSV Tools CSV to JSON Convert CSV to JSON online with header, delimiter, object, and array options. CSV Tools JSON to CSV Convert JSON arrays or objects to downloadable CSV data in your browser. CSV Tools JSON Schema Validator Validate JSON against Draft-07 or Draft 2020-12 schemas with precise error paths. Developer Tools JSONPath Tester Test JSONPath queries, filters, slices, and matching node paths locally. Developer Tools Base64 Encoder / Decoder Encode and decode Unicode-safe Base64 text instantly. Developer Tools URL Encoder / Decoder Encode or decode URL components without sending them anywhere. Developer Tools HTML Entity Encoder / Decoder Convert special characters to and from safe HTML entities. Developer Tools Regex Tester Test JavaScript regular expressions with live match highlighting. Developer Tools