🔒 100% Private — Your files never leave your device

File conversion.
Fast, free, private.

34 professional tools for PDF, image, and text conversion. No upload. No account. No nonsense.

34
Free tools
No account
needed
100%
In browser
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📄 PDF Tools

📎
Merge PDF
Combine multiple PDFs into one. Thumbnail previews.
🗜️
Compress PDF
Reduce file size. Preview before compressing.
✂️
Split PDF
Extract pages or split into individual files.
🔄
Rotate PDF
Rotate pages 90°, 180°, or 270°.
🖼️
PDF to Image
Each page → PNG or JPG. Choose scale.
📷
Image to PDF
JPG, PNG, WebP → multi-page PDF.
🔢
Add Page Numbers
Auto-number with custom position & start.
🔒
Protect PDF
Add a password to your PDF.
🔓
Unlock PDF
Remove password protection.

🖼️ Image Tools

↔️
Resize Image
px dimensions with ratio lock. Live preview.
🗜️
Compress Image
Quality slider. Before/after size shown live.
✂️
Crop Image
Drag to select. Rule-of-thirds overlay.
🔄
Convert Image
PNG ↔ JPG ↔ WebP. Preview first.
🔁
Flip & Rotate
Mirror & rotate. Live canvas preview.
🔤
Add Text to Image
Custom size, color & position. Live preview.
🖼️
Add Border
Frame with color & rounded corners. Live.
🎨
Filters & Effects
Brightness, contrast, sepia, blur sliders.
🎯
Color Picker
Click any pixel → HEX, RGB, HSL. Copy.
Ⓑ
Image to Base64
Encode for HTML/CSS. Copy data URL.
📦
Bulk Resize
Resize many images to same dimensions.

💻 Text & Code Tools

{ }
JSON Formatter
Beautify, validate & minify. Real-time.
📊
CSV to JSON
Upload CSV or paste → structured JSON.
📋
JSON to CSV
JSON array → CSV for Excel/Sheets.
📝
Markdown to HTML
Live preview. Download HTML file.
⬇️
HTML to Markdown
Convert HTML tags to Markdown.
🔗
URL Encoder
Encode/decode URL components.
b64
Base64 Encoder
Encode/decode text to Base64.
</>
XML Formatter
Format or minify XML.
≠
Text Diff
Line-by-line comparison. Green/red.
🔗
Slug Generator
Convert titles to URL-friendly slugs.
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Free Online File Conversion — No Upload, No Account

ConvFiles offers 34 free tools for PDF, image, and text processing. Every tool runs entirely in your browser — your files are never sent to any server. All popular tools now include live previews so you can see exactly what will happen before downloading.

PDF Tools

9 PDF tools cover merging, compressing, splitting, rotating, page numbering, image-to-PDF conversion, and password management. All PDF processing uses PDF-lib and PDF.js running client-side. Each tool shows a first-page preview before processing.

Image Tools

11 image tools with live before/after previews: resize with ratio lock, compress with quality slider, crop with rule-of-thirds overlay, convert formats, flip and rotate, add text watermarks, borders, filters, and more. All use Canvas API locally.

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Convert Files Online with ConvFiles: What You Can Convert

ConvFiles is a free site to convert files online. It handles PDF, image, and text or code files. Choose a tool, add your file, and the work runs in your browser, so nothing is uploaded. The tools do not include video conversion, so there is no MP4 tool.

Which tool for which file

You haveUse this toolYou get
Several PDFsMerge PDFOne PDF
A PDF you need as picturesPDF to ImageOne PNG or JPG per page
JPG, PNG or WebP photosImage to PDFA multi-page PDF
A PNG you need as JPG or WebPConvert ImageThe new format
A CSV fileCSV to JSONStructured JSON
A JSON arrayJSON to CSVA CSV for Excel or Sheets

Two worked examples

  1. You have three PDFs of 12, 8 and 5 pages. Merge PDF gives one file of 12 + 8 + 5 = 25 pages. Then use Add Page Numbers and start at 1. The numbers run from 1 to 25.
  2. You have a photo of 4000 × 3000 px. In Resize Image, turn on the ratio lock and set the width to 1200 px. The height becomes 900 px. Set the width to 800 px and the height becomes 600 px. The 4:3 shape stays the same.

Practical tips

Which file formats can I convert on ConvFiles?

You can turn PDF pages into PNG or JPG, and turn JPG, PNG or WebP images into a PDF. You can also switch images between PNG, JPG and WebP, and convert text formats such as CSV to JSON, JSON to CSV, and Markdown to HTML. Video formats like MP4 are not covered.