Developer and data
Developer and data: 46 free online tools. Compare tasks, read instructions and choose a tool. No account required.
Format and validate JSON, work with CSV and spreadsheets, inspect encodings and prepare structured data. Formatting makes source easier to read; validation checks its structure. Review generated code and converted data before using them in an application.
Choose a tool 46
JSON formatter
Format JSON with readable indentation.
Developer and dataJSON validator
Check JSON syntax and see parsing errors.
Developer and dataJSON minifier
Remove unnecessary whitespace from JSON.
Developer and dataJSON diff
Compare two JSON values and see their differences.
Developer and dataJSON to CSV
Convert an array of objects to spreadsheet-friendly CSV.
Developer and dataCSV to JSON
Parse CSV into a JSON array.
Developer and dataJSON to YAML
Turn JSON values into YAML.
Developer and dataYAML to JSON
Parse YAML and export JSON.
Developer and dataXML formatter
Format supplied XML without resolving external entities.
Developer and dataXML to JSON
Convert XML elements and attributes into JSON.
Developer and dataSQL formatter
Make SQL easier to read in your chosen dialect.
Developer and dataHTML beautifier
Format HTML without running it.
Developer and dataCSS beautifier minifier
Format CSS with consistent indentation.
Developer and dataJavaScript formatter
Format JavaScript without executing it.
Developer and dataBase64 encoder decoder
Encode or decode UTF-8 text as Base64.
Developer and dataURL encoder decoder
Encode or decode a URL component.
Developer and dataHTML entity encoder
Escape or decode HTML entity characters.
Developer and dataJWT decoder
Inspect a JWT header and payload without trusting it.
Developer and dataUUID generator
Generate random v4 or time-ordered v7 UUIDs.
Developer and dataULID generator
Create sortable ULID identifiers.
Developer and dataRegex tester
Test matches and replacements with a bounded regex worker.
Developer and dataUnix timestamp converter
Convert seconds, milliseconds and ISO dates.
Developer and dataSHA256 hash generator
Calculate a SHA-256 hash of your text.
Developer and dataMD5 checksum generator
Calculate a legacy MD5 text checksum.
Developer and dataFile checksum verifier
Calculate a checksum of a file on your device.
Developer and dataHMAC generator
Sign text with an HMAC key that stays local.
Developer and dataJSON schema validator
Validate a JSON example against a draft 7 schema.
Developer and dataCSV viewer editor
Inspect parsed CSV rows and columns.
Developer and dataCSV delimiter converter
Export CSV using a different delimiter.
Developer and dataExcel to JSON
Read a workbook sheet into JSON records.
Developer and dataJSON to Excel
Turn JSON records into an Excel workbook.
Developer and dataCron expression helper
See the next runs of a cron expression.
Developer and dataHTTP status reference
Look up a common HTTP response status.
Developer and dataURL parser
Inspect a URL’s path, query parameters and fragment.
Developer and dataUser agent parser
Estimate browser and platform details from a user agent.
Developer and dataUnicode inspector
Inspect individual Unicode code points and bytes.
Developer and dataString escape unescape
Escape and unescape JSON-compatible strings.
Developer and dataRandom test data generator
Generate clearly synthetic example records.
Developer and dataSQL INSERT generator
Create escaped SQL INSERT statements from JSON.
Developer and dataJSON to TypeScript
Infer a TypeScript type from a JSON example.
Developer and dataJSON to Dart model
Generate a Dart model from a JSON object.
Developer and dataAPI request builder
Build and send a bounded HTTP request.
Developer and dataCertificate decoder
Inspect a PEM certificate’s details and dates.
Developer and dataColor CSS shadow generator
Preview a CSS box shadow and copy the code.
Developer and dataDocument chunk splitter
Split text into overlapping Unicode character chunks.
Developer and dataAI dataset JSONL validator
Validate chat message structures in a JSONL dataset.
Developer and data