Tools (NO UPLOAD)

All tools run 100% in your browser. Files never leave your browser.

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Base64 Encode/Decode (NO UPLOAD)

Encode or decode Base64 locally in your browser. Supports pasted input, copy, and download—files are never uploaded.

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CSV to JSON (NO UPLOAD)

Convert CSV to pretty-printed JSON locally in your browser. Auto-detect delimiter, handle headers, and export JSON—files are never uploaded.

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CSV Validator (NO UPLOAD)

Validate CSV structure locally: detect delimiter, catch unterminated quotes, and find rows with the wrong number of columns. No uploads.

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ENV/.env ↔ JSON Converter (NO UPLOAD)

Convert .env / dotenv to JSON (and JSON to .env) locally in your browser. Supports comments and export lines. Files are never uploaded.

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INI ↔ JSON Converter (NO UPLOAD)

Convert INI to JSON (and JSON to INI) locally in your browser. Supports sections. Files are never uploaded.

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JSON Formatter (NO UPLOAD)

Format (pretty print) or minify JSON locally in your browser. Clear errors, copy, and download—files are never uploaded.

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JSON Repair (NO UPLOAD)

Repair non-strict JSON by removing comments and trailing commas locally in your browser. Convert JSON5-like input to strict JSON—files are never uploaded.

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JSON String Escape/Unescape (NO UPLOAD)

Escape arbitrary text into a valid JSON string literal (or unescape back). Everything runs locally in your browser—no uploads.

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JSON to CSV (NO UPLOAD)

Convert a JSON array of objects to CSV locally in your browser. Simple 1-level flattening and instant CSV download—files are never uploaded.

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JSON to XML Converter (NO UPLOAD)

Convert JSON to XML locally in your browser (no upload). Pretty output, safe escaping, and a configurable root tag. Files are never uploaded.

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JSON Validator (NO UPLOAD)

Validate JSON syntax instantly in your browser. All processing happens locally—files are never uploaded.

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JWT Decoder (NO UPLOAD)

Decode JWT header and payload locally in your browser (no uploads). Pretty JSON output, copy, and download. No network, no tracking.

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NDJSON/JSONL Converter (NO UPLOAD)

Convert NDJSON/JSONL (JSON Lines) to a JSON array, or convert a JSON array back to NDJSON. Everything runs locally in your browser—no uploads.

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.properties ↔ JSON Converter (NO UPLOAD)

Convert Java .properties to JSON (and JSON to .properties) locally in your browser. Supports escapes and multiline values. Files are never uploaded.

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Query String ↔ JSON Converter (NO UPLOAD)

Convert URL query strings (a=1&b=2) to JSON (and JSON to query string) locally in your browser. Supports duplicate keys, type inference, and sorting. Files are never uploaded.

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Text to JSON Array (NO UPLOAD)

Convert plain text lines into a JSON array locally in your browser. Trim lines, ignore empty rows, and download JSON—files are never uploaded.

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TOML ↔ JSON Converter (NO UPLOAD)

Convert TOML to JSON (and JSON to TOML) locally in your browser. Files are never uploaded.

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URL Encode/Decode (NO UPLOAD)

Encode or decode URL-encoded text locally in your browser (no uploads). Handles percent-encoding, copy, and download.

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XML to JSON (NO UPLOAD)

Convert XML to pretty-printed JSON locally in your browser using DOMParser. Clear errors, copy, and download JSON—files are never uploaded.

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YAML ↔ JSON Converter (NO UPLOAD)

Convert YAML to JSON (and JSON to YAML) locally in your browser. Supports multi-document YAML (---). Files are never uploaded.

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YAML Validator (NO UPLOAD)

Validate YAML syntax locally in your browser (NO UPLOAD). Shows clear line/column errors and supports multi-document YAML (---).

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Privacy & Security
All processing happens locally in your browser. Files are never uploaded.