File Converter
Convert between 45+ format combinations: PDF to images, images to PDF, JSON to CSV/XML/YAML/TOML, Markdown to HTML, and much more. Runs entirely in your browser — your files never leave your device.
Drop a file here or click to upload
PDF, images, JSON, CSV, TSV, Markdown, XML, YAML, TXT, HTML, TOML
// POPULAR CONVERSIONS
About Free File Converter
CostlessAI File Converter supports 45+ format combinations across PDF, images, JSON, CSV, XML, YAML, TOML, Markdown, HTML, and plain text. All conversions run entirely in your browser — files are never uploaded to any server. Batch conversion is supported with high-quality output and no watermarks.
Key Features
- -100+ file format conversions
- -PDF, images, JSON, CSV, XML, YAML, Markdown, HTML
- -Browser-based — no uploads to servers
- -Batch conversion support
- -High-quality output
Common Use Cases
- -Converting PDF pages to images
- -Data format transformation (JSON to CSV)
- -Document format migration
- -Developer file conversions
- -Image format optimization
Free File Converter is a free tool by CostlessAI. Available at costlessai.com/tools/file-converter. No signup required.
// FAQ
What file conversions are supported?
Over 45 conversion combinations across 11 format types: PDF, images (PNG, JPG, WebP, HEIC, etc.), JSON, CSV, TSV, XML, YAML, TOML, Markdown, HTML, and plain text. Convert between data formats (JSON to CSV, XML to YAML), document formats (Markdown to HTML, text to PDF), and more.
How does PDF to image conversion work?
Upload a PDF and the tool renders each page at your chosen DPI (72, 150, or 300) using pdf.js. You can select which pages to convert and choose between PNG, JPG, or WebP output format. Each page becomes a separate downloadable image.
Can I combine multiple images into a single PDF?
Yes! Upload multiple images (any format) and select 'PDF' as the output. You can reorder the images before combining. Each image becomes a full page in the output PDF document, sized to fit the image dimensions.
How do data format conversions work?
For structured data (JSON, CSV, TSV, XML, YAML, TOML), the converter parses your file, transforms the data structure, and outputs it in the target format. For tabular conversions (like JSON to CSV), arrays of objects are automatically detected and flattened into rows and columns.
Does Markdown to HTML support all Markdown features?
The converter supports standard Markdown: headings (#), bold (**), italic (*), links, images, unordered and ordered lists, code blocks (fenced and inline), horizontal rules, blockquotes, and paragraphs.
Are my files uploaded to a server?
No. Every conversion runs 100% locally in your browser using JavaScript. Your files never leave your device, making this one of the most private file converters available.
Is this really free?
Yes, 100% free with no limits. Since all processing happens in your browser, there are no server costs. No signup, no watermarks, no file size restrictions beyond your browser's memory.