Converter ONLINE

Free Online Converter Tools

Convert JSON, CSV, XML, YAML, Markdown, text, and other data formats directly in your browser.

Converter Base64URL Decoder Decode padded or unpadded Base64URL data back to readable UTF-8 text. Converter Base64URL Encoder Encode UTF-8 text with the URL-safe Base64 alphabet and optional padding. Converter Data URL Decoder Decode a data URL and inspect its media type, encoding, parameters, and text payload. Converter Data URL Encoder Encode text as a standards-friendly data URL with a selected media type and encoding mode. Converter ISO 8601 Date Converter Convert ISO 8601 timestamps between UTC, Unix time, and readable date formats. Converter JSON Flatten Flatten nested JSON objects and arrays into reversible $-rooted path-value pairs while preserving empty objects, empty arrays, scalar types, and array indexes. Converter JSON Merge Merge 2 JSON documents online with recursive object merging, selectable conflict priority and replace, append or unique array strategies. Converter JSON Unflatten Rebuild nested JSON objects and arrays from a reversible $-rooted flat path map with collision checks, escaped property names, and strict contiguous array indexes. Converter JSON to C# Class Convert representative JSON into reviewable C# output with type inference, nested models, arrays, and practical generation settings. Converter JSON to CSV Convert a non-empty JSON array of objects to CSV with selectable delimiter, header and line-ending options, nested JSON serialization and spreadsheet formula protection. Converter JSON to Dart Class Convert representative JSON into reviewable Dart output with type inference, nested models, arrays, and practical generation settings. Converter JSON to Go Struct Convert representative JSON into reviewable Go output with type inference, nested models, arrays, and practical generation settings. Converter JSON to Java Class Convert representative JSON into reviewable Java output with type inference, nested models, arrays, and practical generation settings. Converter JSON to Kotlin Data Class Convert representative JSON into reviewable Kotlin output with type inference, nested models, arrays, and practical generation settings. Converter JSON to OpenAI Function Schema Convert representative JSON arguments into an OpenAI function tool definition for the Responses API or Chat Completions. Converter JSON to PHP DTO Convert representative JSON into reviewable PHP output with type inference, nested models, arrays, and practical generation settings. Converter JSON to Pydantic Model Generate Pydantic v2 BaseModel classes from JSON with nested models, Python type hints, nullable options, and Field aliases for JSON keys. Converter JSON to Rust Struct Convert representative JSON into reviewable Rust/Serde output with type inference, nested models, arrays, and practical generation settings. Converter JSON to SQL CREATE TABLE Convert representative JSON into reviewable SQL output with type inference, nested models, arrays, and practical generation settings. Converter JSON to Swift Codable Convert representative JSON into reviewable Swift output with type inference, nested models, arrays, and practical generation settings. Converter JSON to TOML Convert JSON objects into readable TOML configuration. Converter JSON to TOON Converter JSON to TOON Converter transforms JSON into compact TOON v4.1 syntax using indentation-based objects, explicit array lengths, and tabular rows for uniform object arrays. Converter JSON to TypeScript Generate a TypeScript interface from representative JSON objects, arrays and primitive values, with a configurable root interface name. Converter JSON to XML Converter JSON to XML Converter transforms JSON objects and arrays into structured XML for integration, migration, and testing workflows. Converter JSON to YAML Convert valid JSON objects, arrays and scalar values to readable YAML while preserving nesting, strings, numbers, booleans, null and Unicode text. Converter JSON to Zod Schema Convert representative JSON into a Zod schema with nested objects, arrays, primitive types, null values, and optional strict object handling. Converter Markdown to HTML Convert common Markdown syntax into HTML for previews, documentation, articles, notes, and lightweight publishing workflows. Converter TOML to JSON Convert practical TOML configuration into formatted JSON. Converter TOON to JSON Converter TOON to JSON Converter decodes TOON v4.1 core syntax back into structured JSON with validation of indentation, array lengths, and tabular rows. Converter Timestamp Converter Convert Unix seconds, milliseconds, microseconds and date-time text to UTC, ISO 8601 and selected timezones. Converter XML to CSV Convert repeated XML records into CSV rows for spreadsheets, imports, reporting, and data review. Converter XML to JSON Convert XML elements, attributes, text values, and repeated nodes into readable structured JSON online. Converter YAML to JSON Convert YAML data to formatted JSON. Converter YAML to XML Converter YAML to XML Converter transforms YAML mappings, lists, and scalar values into structured XML for configuration and integration workflows. Converter cURL to Fetch Convert one cURL HTTP request into reviewable JavaScript Fetch code with method, headers, inline body, redirect policy, timeout, and status handling. Converter cURL to Go net/http Convert one cURL HTTP request into complete Go net/http code with method, headers, inline body, redirect policy, client timeout, response close, and status checks. Converter cURL to PHP cURL Convert one cURL HTTP command into PHP cURL code with method, headers, inline body, redirects, millisecond timeout, execution errors, status checks, and cleanup. Converter cURL to Python Requests Convert one cURL HTTP request into Python Requests code with explicit method, headers, inline body, redirect behavior, timeout, and HTTP error handling.

About this category

What you can do with Converter tools

Trexmi converter tools make it easier to move data between formats and systems. Convert structured and tabular content, normalize input, prepare imports and exports, and create readable or machine-ready output without repetitive manual reformatting.

Converter tools help you complete focused browser-based tasks without installing a separate application or building a complicated workflow. Choose the utility that matches the job, provide the required input, review the output, and continue working immediately.

This directory brings together 38 currently available converter tools in one place. Use the live search and sorting controls to compare utilities by name, purpose, popularity, or recent updates, then open the most relevant option directly from the grid.

The collection is useful for quick one-off work as well as repeatable professional tasks. Clear descriptions explain what each converter tool does before you open it, helping you avoid unnecessary steps and choose a more efficient workflow.

Common workflows

Popular ways to use Converter tools

01Convert JSON, CSV, XML, and YAML

Choose a focused tool from this category, test representative input, and review the generated result before continuing your workflow.

02Transform structured and tabular data

Choose a focused tool from this category, test representative input, and review the generated result before continuing your workflow.

03Prepare data for imports and exports

Choose a focused tool from this category, test representative input, and review the generated result before continuing your workflow.

04Normalize content between systems

Choose a focused tool from this category, test representative input, and review the generated result before continuing your workflow.

05Create readable or machine-ready output

Choose a focused tool from this category, test representative input, and review the generated result before continuing your workflow.

Recommended next

Featured in this category

JSON FlattenFeatured JSON UnflattenFeatured JSON to CSVFeatured JSON to OpenAI Function SchemaFeatured JSON to Pydantic ModelFeatured JSON to TypeScriptFeatured

Fresh utilities

Recently updated

cURL to Go net/httpUpdated cURL to PHP cURLUpdated cURL to Python RequestsUpdated cURL to FetchUpdated JSON FlattenUpdated JSON UnflattenUpdated

Useful answers

Questions people ask before using the tools

Clear answers about access, limits, privacy, and choosing the right workflow.

What are converter tools?

Converter tools are focused browser utilities that help complete a specific task without installing a desktop application or building a custom workflow.

Are Trexmi converter tools free?

Most tools can be opened and tested for free. Account and PRO limits apply only where a larger workload or additional usage allowance is required.

Do converter tools upload my data?

Each tool explains its processing model on the page. Browser-based tools process locally where possible, while server processors use the submitted input only to produce the requested result.

How do I choose the right converter tool?

Start with the exact output you need, compare the descriptions in the directory, then test the most relevant tool with representative input before using the result in production.

Can I use these tools for professional work?

Yes. They are designed for repeatable development, content, data, QA, office, and technical workflows, but important output should still be reviewed before production use.

Will more converter tools be added?

Yes. Trexmi expands existing categories as new focused workflows are implemented and tested.