100% in-browser · No uploads · No signup

Free File Converters for Developers

Convert JSON, CSV, Excel, YAML, XML, Markdown, HTML, PDF and Word files instantly — right in your browser. Fast, private and completely free.

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Data Conversions

For developers & data engineers

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JSON CSV

JSON to CSV Converter

Paste a JSON array (or upload a .json file) and instantly get a clean, spreadsheet-ready CSV. Nested objects are flattened with dot-notation so nothing is lost.

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CSV JSON

CSV to JSON Converter

Turn any CSV into a structured JSON array. Headers become object keys, and numbers and booleans are detected automatically so your JSON is ready to use.

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JSON Excel

JSON to Excel (XLSX) Converter

Turn a JSON array into a real Excel workbook (.xlsx). Each object becomes a row and each key a column — ready to open in Excel, Google Sheets or Numbers.

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JSON YAML

JSON to YAML Converter

Convert JSON into clean, human-readable YAML — ideal for Kubernetes manifests, Docker Compose, GitHub Actions and other DevOps configuration files.

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YAML JSON

YAML to JSON Converter

Parse any YAML — config files, manifests, OpenAPI specs — into clean, formatted JSON you can drop straight into code or an API client.

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XML JSON

XML to JSON Converter

Convert XML — legacy data exports, SOAP responses, RSS feeds — into modern, readable JSON. Attributes and nested elements are preserved.

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JSON SQL

JSON to SQL Converter

Generate ready-to-run SQL INSERT statements (plus an optional CREATE TABLE) from a JSON array. Supports MySQL, PostgreSQL, SQLite and SQL Server.

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Document Conversions

For writers, students & teams

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Markdown HTML

Markdown to HTML Converter

Turn Markdown into clean, semantic HTML with a live preview. Supports GitHub-Flavored Markdown: tables, fenced code blocks, task lists and more.

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HTML Markdown

HTML to Markdown Converter

Convert HTML into clean Markdown — perfect for moving web content into a docs site, README, or Markdown-based CMS. Links, lists, headings and code are preserved.

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Markdown PDF

Markdown to PDF Converter

Write or paste Markdown and download a clean, print-ready PDF. Great for documentation, meeting notes, READMEs and study sheets.

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HTML PDF

HTML to PDF Converter

Paste HTML markup and download it as a clean PDF — handy for invoices, reports, certificates and saving rendered snippets as documents.

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DOCX Markdown

Word (DOCX) to Markdown Converter

Upload a Word .docx file and get clean Markdown — ideal for writers migrating drafts into a docs site, static blog or README. Headings, lists and formatting are preserved.

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Spreadsheet & Table Conversions

For everyone

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CSV Excel

CSV to Excel (XLSX) Converter

Turn a CSV into a proper Excel workbook (.xlsx) with clean columns — no more import wizards or mangled data. Open it directly in Excel or Google Sheets.

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Excel CSV

Excel (XLSX) to CSV Converter

Upload an Excel workbook (.xlsx or .xls) and download clean CSV. Choose which sheet to export — perfect for importing into databases, scripts and data pipelines.

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CSV HTML Table

CSV to HTML Table Converter

Turn CSV into clean, semantic HTML <table> markup with a live preview — ready to paste into a web page, email or CMS.

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Private by design

Conversions run entirely in your browser. Your files are never uploaded to any server.

Instant results

No queues, no waiting. Output is generated the moment you paste your data.

Free & unlimited

Every tool is free with no sign-up, no watermarks and no file-size limits.

Developer-friendly

Clean output, smart type detection and options that match how you actually work.

The fastest way to convert files online

QuickConvert is a free collection of 15+ file conversion tools built for developers, data engineers, writers and students. Whether you need to turn a JSON array into CSV, convert Markdown to HTML, or export an Excel sheet to CSV, you can do it in seconds without installing anything.

Every converter works entirely inside your browser. There are no uploads, no accounts and no limits — which means your data stays completely private and your conversions are lightning fast.

Popular conversions

JSON to CSV & CSV to JSON — for APIs and spreadsheets
JSON to YAML & YAML to JSON — for DevOps configs
Markdown to HTML & HTML to Markdown — for docs
Markdown to PDF & HTML to PDF — for sharing
CSV to Excel & Excel to CSV — for data work