Free online tools that respect your privacy
Compress images, convert HEIC photos, merge PDFs, generate QR codes and more — all 100% free. Your files never leave your device.
Processed entirely in your browser. No uploads. No accounts. No tracking of your files.
Browse the toolsImage Tools
- Image CompressorpopularShrink JPG, PNG, and WebP images without losing quality — right in your browser.
- HEIC to JPGConvert iPhone HEIC photos to JPG or PNG instantly, with no upload.
- Image ConverterConvert between JPG, PNG, WebP, and AVIF formats locally in your browser.
- Image ResizernewResize images by pixels, percentage, or preset — batch-process in your browser.
PDF Tools
- Merge PDFpopularCombine multiple PDF files into one document — your files never leave your device.
- Split PDFnewSplit a PDF by page ranges, into single pages, or every N pages — all in your browser.
- PDF to JPGnewConvert each PDF page to a JPG or PNG image, right in your browser — no uploads.
- Image to PDFTurn JPG and PNG images into a single PDF, entirely in your browser.
Utilities
- QR Code GeneratorpopularCreate custom QR codes for links, text, and Wi-Fi — free and private.
- Word CounterCount words, characters, sentences, and reading time as you type.
- Password GeneratorGenerate strong, random passwords locally — nothing is ever sent to a server.
- Case ConverterConvert text to UPPERCASE, lowercase, Title Case, and more in one click.
- JSON FormatternewFormat, validate, and minify JSON with clear error messages — all in your browser.
Powerful tools that run entirely in your browser
ToolFlux is a growing collection of fast, free, and genuinely private utilities for working with images, PDFs, and everyday text. Unlike most "online" converters and compressors, none of these tools upload your files to a server. The moment you pick a file, all of the work — resizing, re-encoding, merging, counting — happens locally on your own device using modern web technology, and the result is handed straight back to you for download.
How client-side processing works
Modern browsers ship with surprisingly capable engines. ToolFlux uses the Canvas API for image work and compiled WebAssembly codecs for high-quality compression and format conversion, and runs the heavy lifting inside a Web Worker so the page never freezes, even with large files. Because the computation runs on your machine, there is no upload wait, no file-size cap imposed by a server, and no copy of your document sitting in someone else's cloud. When you close the tab, nothing remains.
Privacy is the whole point
We built ToolFlux around a simple promise: your files never leave your device. There are no user accounts, no file logs, and no server-side storage — the only thing our servers ever send to you is the web page itself. That makes these tools a safe choice for sensitive documents like scanned IDs, contracts, medical forms, and personal photos. Pick a tool below to get started; each one includes step-by-step instructions and answers to common questions.