Converts CSV files to JSON format — spreadsheets, database exports, and data imports to APIs, configuration files, and data exchange between web services. All conversion happens locally in your browser with no file size limits.
Runs on Papa Parse
Content reviewed October 2026 · About Toolzum
Converts JSON files to CSV format — APIs, configuration files, and data exchange between web services to spreadsheets, database exports, and data imports. All conversion happens locally in your browser with no file size limits.
Converts CSV files to XML format — spreadsheets, database exports, and data imports to enterprise systems, SOAP APIs, document formats like DOCX and SVG. All conversion happens locally in your browser with no file size limits.
Converts XML files to CSV format — enterprise systems, SOAP APIs, document formats like DOCX and SVG to spreadsheets, database exports, and data imports. All conversion happens locally in your browser with no file size limits.
Converts HEIC files to PDF format — Apple device photos to document sharing, printing, and archival with consistent formatting. All conversion happens locally in your browser with no file size limits.
Converts PDF files to HTML format — document sharing, printing, and archival with consistent formatting to web pages, email templates, and content rendering. All conversion happens locally in your browser with no file size limits.
CSV (Comma-Separated Values) uses tabular plain text encoding and is best for spreadsheets, database exports, and data imports. JSON (JavaScript Object Notation) uses human-readable structured data encoding and excels at APIs, configuration files, and data exchange between web services. Converting between them lets you take advantage of each format's strengths — for example, using a compressed format for sharing and a lossless format for editing. All conversion happens locally in your browser with no file size limits.
Converts CSV files to JSON format — spreadsheets, database exports, and data imports to APIs, configuration files, and data exchange between web services. All conversion happens locally in your browser with no file size limits.
From tabular plain text to human-readable structured data: quality is preserved as far as the formats allow.
Yes — archive CSV originals before batch-converting. Re-converting from JSON back to CSV never restores discarded data.
Seconds for typical files on a modern device; large files scale with size and CPU. Conversion speed depends on the machine, not the formats — close heavy tabs for big batches.
JSON to CSV
Converts JSON files to CSV format — APIs, configuration files, and data exchange between web services to spreadsheets, database exports, and data imports. All conversion happens locally in your browser with no file size limits.
Data Format Converter
Convert data between JSON, CSV, XML, YAML, and TSV with structure preserved. Migrate configs across stacks without rewriting — local PapaParse/xml2js/yaml parsing, free, no signup.
CSV ↔ HTML Table Converter
Bidirectional converter between CSV data and HTML table markup with live preview. Files are converted locally in your browser — nothing is uploaded.
CSV Row / JSON Generator
Generate random CSV rows or JSON lines for fixtures and tests — pick a format and row count. Seed mock data fast — local generation, free, no signup.
CSV to NDJSON
Convert CSV rows to newline-delimited JSON for streaming pipelines and log systems. Feed Kafka without reformatting — local conversion, free, no signup.