Free online file tools — no uploads, your files never leave your browser. Compress images to an exact size, convert HEIC/AVIF/WebP, edit photos, merge and split PDFs, and generate business documents — all in your browser.
100% private: files are processed on your device and never uploadedMost online file tools work by sending your file to a server, converting it there, and sending it back. That design has three costs you pay without noticing: your file sits on somebody else's disk (under their retention policy, not yours), large files crawl through your upload bandwidth, and the free tier caps you at whatever size their server budget allows.
DocToolsKit inverts it. The conversion engine — canvas codecs, a WebAssembly HEIC decoder, the same PDF.js renderer Firefox uses — is downloaded to your browser once, and from then on your file never moves. You can load a page, switch off your Wi-Fi, and every tool still works. It is faster on repeat use, has no file-size caps beyond your own device memory, and is the only honest answer for documents you would not email to a stranger: IDs, contracts, bank statements, medical paperwork.
| Group | Tools |
|---|---|
| Image Compression | Compress to exact KB targets (20KB–2MB), JPEG quality slider, PNG resizer |
| Image Converter | HEIC, AVIF, WebP, PNG, JPG, GIF, BMP conversions |
| Image Editing | Resize, rotate, flip, mirror, circle crop, merge images |
| PDF Tools | Images to PDF, PDF to images, merge, split, extract text |
| Barcode Tools | Code 128, QR, PDF417, EAN-13, ITF-14, Aztec, ISSN and vCard contact codes — type, generate, download PNG |
| Document Templates | Invoice, proforma, receipts, bill of sale, PO, work order, NDA — fill in, get PDF |