Every tool you need.
Nothing leaves your device.

Free online tools that respect your privacy

Toolzen is a collection of free online tools and utilities built around one rule: your data stays on your device. Most web tools upload your text, passwords or images to a server to process them. Toolzen tools don't — everything runs in your browser using modern web APIs, which makes them faster, safer, and usable even without an internet connection. No signup, no account, no usage limits.

What can you do with Toolzen?

Generate strong passwords

SecurePass is a free password generator that creates strong random passwords and easy-to-remember passphrases with a live strength meter. It uses your browser's built-in Web Crypto API, so no password is ever transmitted or stored.

Count words and characters

WordWise, our free word counter and character counter, counts words, characters, sentences and estimated reading time in real time — plus keyword density and social media character limits. Useful for essays, blog posts, captions and SEO meta descriptions.

Compress, resize and convert images

Compresso, our free image compressor, lets you compress images online — shrink JPG, PNG and WebP files up to 90% smaller, or hit an exact target like 100 KB, without uploading your photos anywhere. Coming next: resize images to exact dimensions for social media or the web, and convert between image formats like JPG to PNG or PNG to WebP.

Create signatures and business stamps

Stampo, our free signature maker and stamp maker, lets you draw, type or upload a handwritten signature and design round, oval or rectangle business stamps with curved text — PAID, APPROVED, RECEIVED and your own custom text. Everything exports as a clean transparent PNG you can drop onto invoices and documents.

Find out how old your pet really is

PawAge, our free dog age calculator and cat age calculator, converts dog years to human years and cat years to human years using vet-backed charts adjusted for breed size — no more "multiply by 7". It shows your pet's life stage and even the DNA-clock estimate from the 2019 epigenetic study.

Plan any investment

Investo, our free investment calculator suite, covers compound interest, SIP returns with annual step-up, loan EMI with a full payoff schedule and retirement planning adjusted for inflation. Charts and 20 currencies included — whether you invest in stocks, property, crypto or your own business, the math runs privately in your browser.

Clean up AI-generated text

Humanly, our free AI text cleaner and humanizer, strips the telltale signs of machine writing: em dashes, curly quotes, emoji, hidden characters and more than 50 AI filler phrases like "in today's fast-paced world" and "leverage". Category toggles and click-to-keep highlights leave you in control, and your text is processed entirely in your browser — nothing is ever uploaded.

Track your cycle privately

Ovulo, our free ovulation calculator, estimates your fertile window, next ovulation date and upcoming periods from your cycle length — the kind of data that should never sit on someone's server. Ovulo runs entirely in your browser: nothing you enter is stored, logged or uploaded.

Total your work hours

Clocked, our free time card calculator, adds up your weekly hours worked from clock-in, clock-out and break times — splitting regular from overtime hours, converting to decimal hours for payroll and estimating gross pay. Print a signable timesheet or download a CSV; your entries are saved only in your own browser, never on a server.

Create QR codes

QRGen, our free QR code generator, makes static QR codes for links, WiFi access, vCard contacts, email, phone and SMS — with your logo in the center and your colors. Download PNG or crisp vector SVG. Static codes never expire: the data lives in the pattern itself, not on a server — and nothing you enter ever leaves your browser.

Grab tools from any tab

The Toolzen Quick Tools Chrome extension puts the most-used tools one click away in your browser toolbar — same tools, same privacy, no tab switching.

How Toolzen keeps your data private

Each tool ships as a self-contained page with no backend. Password generation, text analysis and image processing all happen in memory on your device. You can verify it yourself: open your browser's network tab while using any tool and you'll see zero data requests. Every tool also works offline once loaded, and can be installed as an app.

FAQ

Are the tools really free?

Yes — every tool is free with no signup and no usage limits. The site is supported by non-intrusive ads and by readers who buy us a coffee.

Do I need to create an account?

No. There are no accounts anywhere on Toolzen.

Can I use the tools offline?

Yes. Every tool is an installable PWA that keeps working without a connection once loaded.

Who is behind Toolzen?

Toolzen is built by Dot2Shape, a design and development studio. New tools ship regularly — each one a focused product with its own identity. For support, advertising or collaboration, email support@toolzen.app.