Free Online File Converter
Merge and sign PDFs, convert images and PDFs in seconds. Everything runs right in your browser, so your files never leave your device. No signup, no watermarks.
Converters
Tools
Converters
Pick a Tool & Get Started
Free image and file converters grouped by category, from PNG to JPG to combining images into a PDF. New tools are added every week.
PDF Tools 6
Merge PDF
Combine multiple PDFs (and images) into one document.
Use tool NewSign PDF
Draw, type or upload your signature and sign any PDF.
Use toolPDF to JPG
Save PDF pages as JPG, PNG or WebP images up to 300 DPI.
Use toolImage to PDF
Turn JPG, PNG or HEIC images into a PDF on Letter or A4 pages.
Use toolPNG to PDF
Turn one or many PNG images into a single PDF document.
Use toolCombine JPG to PDF
Merge multiple JPG photos into one PDF in the order you choose.
Use toolImage Converters 8
PNG Converter
Convert from PNG to JPG, WebP or PDF — batch, per-file formats & background color.
Use toolWebP to PNG Converter
Open WebP images anywhere by converting them to PNG.
Use toolJFIF to PNG
Convert JFIF images saved from the web into PNG or JPG.
Use toolSVG to JPG
Render SVG vector graphics as high-quality JPG or PNG images.
Use toolPNG to ICO Converter
Create favicon .ico files from PNG images in multiple sizes.
Use toolPNG to JPG
Turn transparent PNGs into lightweight JPG photos.
Use toolJPG to PNG
Convert JPG photos to lossless PNG images.
Use toolHEIC to JPG
Convert iPhone HEIC photos to universal JPG files.
Use toolImage Tools 2
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What Do You Want to Convert?
Jump straight to the most-searched conversions. Each one runs privately in your browser.
Built to Be Fast, Free & Private
No uploads, no waiting in queues, no watermarks. Just open a tool and convert.
Private by Design
Files are processed on your device. Nothing is uploaded or stored on our servers.
Lightning Fast
No upload or download wait — conversions finish in a blink, even in batches.
Free Forever
No signup, no limits on file count and no watermarks on your results.
Works Everywhere
Desktop, tablet or phone — Windows, Mac, iPhone, Android and Chromebook.
Convert in 3 Easy Steps
Choose a tool
Pick the converter you need from the list above or the menu.
Add your files
Drag & drop or select files. Add one or many at the same time.
Download
Click convert, then download files one by one or as a single ZIP.
Frequently Asked Questions
Is K4Converter really free?
Yes. Every tool is completely free to use with no signup, no daily limits and no watermarks. The site is supported by non-intrusive ads.
Are my files uploaded to a server?
No. Our converters run entirely in your web browser using modern web technology, so your files never leave your device.
Do the tools work on iPhone and Android?
Yes. K4Converter is fully responsive and works in Safari, Chrome, Edge and Firefox on phones, tablets and computers.
Can I convert multiple files at once?
Yes. Most tools support batch conversion — add as many files as you like and download them all together as a ZIP file.
What can I convert with K4Converter?
PDFs (merge, sign, PDF to JPG, images to PDF), images (PNG, JPG, WebP, HEIC, JFIF, SVG and ICO), image compression and resizing, plus everyday converters for Roman numerals, military time and temperature.
Ready to Convert Your First File?
Start with our most popular tool — convert PNG images to JPG, WebP or PDF in seconds.
Open PNG Converter →