Free online tools that run in your browser: https://fbuff.com
No signup, no uploads. Every tool processes your files and data locally with web APIs.
- Thanksgiving Card Maker: free printable Thanksgiving cards with a name. Print on 4x6 or send by text.
- Christmas Card Maker: pick a design, add your names and message, download a PNG or print it.
- Photo Calendar Maker: a printable monthly calendar with your own photo, family name and important dates.
- Save the Date Maker: names, date and place on a ready-made template.
- Sign PDF: draw or type your signature and place it on any page. The file never leaves your device.
- Redact PDF: black out names and numbers so the text is really gone, not just covered.
- Passport Photo Maker: 2x2 inch or 35x45 mm photos, laid out on a 4x6 print.
- How to Write a Check: turns an amount into words, with cents, and shows where each line goes.
- Shipping Label Cropper: crop a full-page shipping label PDF to 4x6 for a thermal printer.
- HTTP2Shell Checker: is your Node.js, Bun, Python Brotli or libbrotli affected by CVE-2026-111497? Script and fixed versions: fbuff-tools/http2shell-checker.
- KSMBD Exposure Checker: is a Linux server running KSMBD and open to ZDI-CAN-33774 / ZDI-CAN-33549? Script and mitigations: fbuff-tools/ksmbd-checker.
- DarkSword iPhone Check: type your iOS version to see if your iPhone is open to DarkSword or P7 DarkSword spyware and which update fixes it.
- PHP2Shell Checker: paste php -v or phpinfo() to check CVE-2026-109618 and CVE-2026-109619. Script and fixed packages: fbuff-tools/php2shell-checker.
- Downforce Calculator: how much downforce, fan suction or thrust a car needs to drive upside down, like the 2026 Tesla Roadster.
- QR Code Generator: links, text and Wi-Fi, with a logo and colors. Static codes that never expire.
- Image Compressor: compress JPG, PNG and WebP to a target size such as 100 KB.
- Barcode Generator: Code 128, EAN-13, EAN-8, UPC-A, PDF417.
- 2FA Code Generator: TOTP codes from a secret key.
A static Next.js site on Cloudflare Pages with no backend. Heavy libraries (PDF, barcode, image processing) load only when a tool needs them.