Convert Large CSV/XLSX to JSON or XML in Browser
Hello HN, I'm excited to share a project I've been working on: A simple, fast way to process huge CSV and XLSX files directly in your browser and export them as clean JSON or XML Here's a few things that makes this converter different: - runs in the browser - all parsing and conversion is client side can handle data any size data - automatically detects delimiters, encodings, and data types as it parses - Live preview with column renaming, search/replace, and data cleanup - Export to JSON or XML — clean, structured output that can be used for API or Databases backstory: I built this…
Convert Large CSV/XLSX to JSON or XML in Browser launched on May 1, 2025 with 41 votes, #649 of 7,905 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 1 year on.
In plain words
This browser-based tool converts large CSV and XLSX files into JSON or XML format entirely on the user's computer. It handles files of any size without uploading data to servers, automatically detecting delimiters, encodings, and data types during parsing. The tool offers a live preview with features for column renaming, search and replace, and data cleanup before export. Designed for developers and data workers who need to transform spreadsheet data into structured formats suitable for APIs or databases.
written from the facts on this page · September 2026
From the sources
Convert CSV, Excel, TSV, and TXT files into JSON, XML with CSVForge. Fast, browser-based, no-code data conversion — perfect for developers and analysts handling large datasets.
Drop your files in. Get perfect JSON, XML, or CSV in seconds. No code, no setup — just fast, browser-based data conversion. Transform, visualize, and export your data with our powerful converter that processes everything locally in your browser. Import CSV, TSV, XLSX, XLS and TXT files with automatic format detection and encoding support. Smart data type detection (text, number, date, boolean) with preview of irregular data structures. Rename headers, enable/disable fields, and reorder columns with intuitive drag-and-drop interface. Split column content based on delimiters to separate combined data into multiple fields. Merge columns with custom separators to create new combined fields from…from csvforge.com
In the maker’s words, at launch
Hello HN, I'm excited to share a project I've been working on: A simple, fast way to process huge CSV and XLSX files directly in your browser and export them as clean JSON or XML Here's a few things that makes this converter different: - runs in the browser - all parsing and conversion is client side can handle data…
Does a similar job
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- Excel to JSON Converter2025 · convert-excel-to-json.emp0.com · ▲7
Convert excel & csv files to json online, free and secure
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JSON to Excel ConverterMar 2026 · jsontoexcel.cloud · ▲5Convert any JSON to Excel in second 100% private, no uploads
JSON SupportJul 2026 · jsonsupport.com · ▲3Convert JSON to Excel (.xlsx) online for free — no sign-up, nothing stored. Also available as a rate-limited developer API for building conversion into your own product.
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