About us

About CozyToolz

CozyToolz is a collection of free online tools for small, everyday jobs: merging PDFs for a form, shrinking a photo to fit an upload limit, trimming a video clip, formatting some JSON or working out a loan payment.

We built it because many tool sites are slow, covered in pop-ups, limit how many files you can process, or ask you to upload private documents to servers you know nothing about. We wanted the opposite: calm pages, clear instructions and tools that do the work on your own device.

How our tools work

Our tools run in your web browser using JavaScript, WebAssembly and built-in browser features such as the Canvas, Web Audio and WebCodecs APIs. When you choose a file, your browser processes it and creates the result on your device. We never receive a copy. This also means the tools keep working on a slow connection once the page has loaded.

What we offer

There are 199 tools today, in these categories:

• PDF tools (22): merge, split, compress, sign and convert pdfs.
• Image tools (26): compress, resize, crop, convert and edit photos.
• Video tools (9): trim, compress, convert and turn clips into gifs.
• Audio tools (10): convert, trim, record and adjust audio.
• YouTube tools (10): thumbnails, timestamps, embeds and title checks.
• Text tools (19): count, clean, convert and compare text.
• Developer tools (24): format, encode, decode, test and generate.
• Converters tools (19): units, time zones, numbers and data formats.
• Calculators tools (17): age, percentage, bmi, dates, grades and more.
• Finance tools (16): loans, interest, savings, tax and tips.
• Generators tools (14): passwords, qr codes, colours, names and random picks.
• Everyday tools (13): timers, notes, invoices and small daily helpers.

Every tool page explains what the tool does, gives step-by-step instructions and answers common questions. Calculators show the formula they use, so you can check the maths yourself.

The CozyToolz blog explains how to use the tools for everyday tasks, with sample inputs and ways to check your results.

Our principles

• Private by design. Your files stay on your device.
• Free without tricks. No sign-up, no watermarks, no daily limits.
• Honest results. If a tool has a limit, the page says so.

How CozyToolz is funded

CozyToolz is free to use. We plan to support the site with advertising in the future. Our Privacy Policy explains how we handle your data and how advertising would work.

Get in touch

Found a bug or want a tool we do not have yet? Contact us.