Free online data tools
Formatters and converters for structured data. Paste or drop a file; parsing stays in memory.
Popular
JSON to CSV
Convert JSON to CSV in your browser. Paste an array or object; nested keys are flattened. Data is not sent to a server.
CSV to JSON
Convert CSV to JSON in your browser. Paste or drop a file; choose headers and delimiter. Local only.
JSON to YAML | JSON ↔ YAML
Convert JSON to YAML (and YAML to JSON) in the browser. Structure and indentation preserved. Config never uploaded.
JSON Formatter
Pretty-print and format JSON in your browser. Your data never leaves your device. Free, private, no upload required.
JSON Validator
Validate JSON syntax and find errors instantly in your browser. Your data never leaves your device. Free and private.
Bank statement to CSV
Reformat bank statement text to CSV locally. 100% private, no-upload processing with zero server latency.
CSV editor
Paste CSV, edit cells in a grid, and download CSV or PDF locally. 100% private, no-upload processing with zero server latency.
CSV to SQL INSERT
Turn CSV into INSERT statements. Identifiers are quoted. Runs in the browser.
All data tools
JSON to CSV
Convert JSON to CSV in your browser. Paste an array or object; nested keys are flattened. Data is not sent to a server.
CSV to JSON
Convert CSV to JSON in your browser. Paste or drop a file; choose headers and delimiter. Local only.
JSON to YAML | JSON ↔ YAML
Convert JSON to YAML (and YAML to JSON) in the browser. Structure and indentation preserved. Config never uploaded.
CSV duplicate remover
Remove duplicate CSV rows by selected columns. Paste or drop; download cleaned CSV. Local only.
CSV column extractor
Keep only chosen CSV columns. Output a new CSV. Local only.
JSON minifier
Minify JSON in your browser by removing whitespace. Data is not sent to a server.
XML formatter
Format and indent XML in your browser using the native parser. No server communication.
CSV to Markdown
Turn CSV into a Markdown table in your browser. Processing stays local.
JSON Formatter
Pretty-print and format JSON in your browser. Your data never leaves your device. Free, private, no upload required.
JSON Validator
Validate JSON syntax and find errors instantly in your browser. Your data never leaves your device. Free and private.
JSON to XML
Convert JSON data to XML format in your browser. Your data never leaves your device. Free and private.
XML to JSON
Convert XML to JSON in your browser. Your data never leaves your device. Free and private.
CSV to XML
Convert a CSV table to XML in your browser. Your data never leaves your device. Free and private.
CSV Transpose
Swap rows and columns of a CSV in your browser. Your data never leaves your device. Free and private.
CSV to HTML Table
Turn CSV into clean HTML table markup in your browser. Your data never leaves your device. Free and private.
YAML to JSON
Convert YAML to JSON in your browser. Your data never leaves your device. Free and private.
CSV to YAML
Convert CSV to YAML in your browser. Your data never leaves your device. Free and private.
Bank statement to CSV
Reformat bank statement text to CSV locally. 100% private, no-upload processing with zero server latency.
CSV editor
Paste CSV, edit cells in a grid, and download CSV or PDF locally. 100% private, no-upload processing with zero server latency.
CSV to SQL INSERT
Turn CSV into INSERT statements. Identifiers are quoted. Runs in the browser.
CSV pivot and unpivot
Pivot a CSV on a key column or unpivot wide columns into rows. Local parse.
JSON structural diff
Compare two JSON documents for added, removed, and changed paths. No upload.
Why client-side data tools?
CSV and JSON exports frequently contain customer or production data. A local parser is the difference between a converter and an accidental leak.