--- title: "Free Online File Converter (PNG, JPG, PDF) | K4Converter" description: "Free online file and PDF tools that work in your browser. Merge and sign PDFs, convert PDF to JPG, images to PDF, PNG to JPG and more. No upload." url: https://k4converter.com/ --- ✦ 100% free · no signup # 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. Image Converters PDF Tools Unit Converters [Explore All Tools](https://k4converter.com/#tools) [Try PNG Converter](https://k4converter.com/png-converter.html) Files processed locally · works on every device Our tools ## 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](https://k4converter.com/merge-pdf.html): Combine multiple PDFs (and images) into one document. - [Sign PDF](https://k4converter.com/sign-pdf.html): Draw, type or upload your signature and sign any PDF. - [PDF to JPG](https://k4converter.com/pdf-to-jpg.html): Save PDF pages as JPG, PNG or WebP images up to 300 DPI. - [Image to PDF](https://k4converter.com/image-to-pdf.html): Turn JPG, PNG or HEIC images into a PDF on Letter or A4 pages. - [PNG to PDF](https://k4converter.com/png-to-pdf.html): Turn one or many PNG images into a single PDF document. - [Combine JPG to PDF](https://k4converter.com/jpg-to-pdf.html): Merge multiple JPG photos into one PDF in the order you choose. ### Image Converters 8 - [PNG Converter](https://k4converter.com/png-converter.html): Convert from PNG to JPG, WebP or PDF — batch, per-file formats & background color. - [WebP to PNG Converter](https://k4converter.com/webp-to-png.html): Open WebP images anywhere by converting them to PNG. - [JFIF to PNG](https://k4converter.com/jfif-to-png.html): Convert JFIF images saved from the web into PNG or JPG. - [SVG to JPG](https://k4converter.com/svg-to-jpg.html): Render SVG vector graphics as high-quality JPG or PNG images. - [PNG to ICO Converter](https://k4converter.com/png-to-ico.html): Create favicon.ico files from PNG images in multiple sizes. - [PNG to JPG](https://k4converter.com/png-to-jpg.html): Turn transparent PNGs into lightweight JPG photos. - [JPG to PNG](https://k4converter.com/jpg-to-png.html): Convert JPG photos to lossless PNG images. - [HEIC to JPG](https://k4converter.com/heic-to-jpg.html): Convert iPhone HEIC photos to universal JPG files. ### Image Tools 2 - [Image Compressor](https://k4converter.com/image-compressor.html): Reduce image file size without visible quality loss. - [Image Resizer](https://k4converter.com/image-resizer.html): Resize images to exact pixels or percentages. ### Everyday Converters 3 - [Roman Numeral Converter](https://k4converter.com/roman-numeral-converter.html): Convert numbers to Roman numerals and back. - [Military Time Converter](https://k4converter.com/military-time-converter.html): Switch between 24-hour and 12-hour time. - [Celsius to Fahrenheit](https://k4converter.com/celsius-to-fahrenheit.html): Convert °C to °F with the formula explained. No tools match your search yet — try another keyword. Popular conversions ## What Do You Want to Convert? Jump straight to the most-searched conversions. Each one runs privately in your browser. [Merge PDF files](https://k4converter.com/merge-pdf.html) [Sign a PDF](https://k4converter.com/sign-pdf.html) [Save a PDF as JPG](https://k4converter.com/pdf-to-jpg.html) [Convert image to PDF](https://k4converter.com/image-to-pdf.html) [Convert PNG to JPG](https://k4converter.com/png-to-jpg.html) [Convert PNG to PDF](https://k4converter.com/png-to-pdf.html) [Combine JPG to PDF](https://k4converter.com/jpg-to-pdf.html) [HEIC to JPG (iPhone photos)](https://k4converter.com/heic-to-jpg.html) [WebP to PNG](https://k4converter.com/webp-to-png.html) [Compress images](https://k4converter.com/image-compressor.html) [Resize images](https://k4converter.com/image-resizer.html) [Make a favicon (PNG to ICO)](https://k4converter.com/png-to-ico.html) [Convert images to different formats at once](https://k4converter.com/png-converter.html#different-formats) [Roman numeral converter](https://k4converter.com/roman-numeral-converter.html) [Military time converter](https://k4converter.com/military-time-converter.html) [Celsius to Fahrenheit](https://k4converter.com/celsius-to-fahrenheit.html) Why K4Converter ## 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. How it works ## 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. FAQ ## 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 →](https://k4converter.com/png-converter.html) --- K4Converter: free, private file tools that run in your browser. Full index for agents: https://k4converter.com/llms.txt