Launching today
K4Converter
Bulk-convert images & PDFs in your browser, get one ZIP
2 followers
Bulk-convert images & PDFs in your browser, get one ZIP
2 followers
K4Converter is a free set of 19 file tools that run entirely in your browser, so your files never leave your device. Built for real workflows: drop dozens of files at once, pick a different output format for each file, preview every result, then download everything in one ZIP. Merge and sign PDFs, PDF to JPG, images to PDF, HEIC/PNG/JPG/WebP/SVG conversion, compress and resize. No signup, no watermarks, no limits.
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Hey Product Hunt! 👋 I'm Prakhar, the maker of K4Converter.
I kept running into the same annoyance: I'd need to convert 20 photos or merge a few PDFs, and every "free" site wanted me to upload private files to a server, sign up, or accept a watermark. So I built K4Converter, where everything runs 100% in your browser.
What makes it different:
📦 Bulk mode: drop dozens of files at once and convert them all in one click
🗜️ One-click ZIP: download every result together, not file by file
🎯 Per-file formats: turn one file into JPG, another into WebP, another into PDF, all in the same batch
👀 Preview first: check every result before you download
🎨 Background colour: fill transparent PNGs with any colour, or keep them transparent
📄 PDF tools: merge, sign, PDF → JPG and image → PDF (Letter/A4, any orientation)
📱 HEIC support: convert iPhone photos straight to JPG
🔒 Private by design: no uploads, no signup, no watermarks
I'd love your feedback. Which tool should I build next?