Free Online Tools
Fast, private, browser-only tools. Everything runs locally on your device — nothing is uploaded, no account is needed. Choose a category below.
- CalculatorsEMI, percentage, age, BMI, discount, salary & more.
- Image ToolsWebP/PNG/JPG/HEIC converters, compressor & resizer.
- PDF ToolsMerge, split, compress, organise & convert PDFs.
- Text ToolsDedupe, sort, count, convert & clean text.
- URL ToolsEncoder, slug generator, parser & more.
Popular tools
- EMI CalculatorMonthly loan payment, interest & amortization.
- Percentage CalculatorPercent of a number & percentage change.
- WebP to PNGConvert WebP images to PNG.
- Image CompressorReduce image file size instantly.
- Image ResizerResize images to exact pixel dimensions.
- Image to PDFTurn JPG or PNG images into one PDF.
- Merge PDFCombine several PDF files into one document.
- Compress PDFShrink a PDF that is too big to email.
- JPG to PDFTurn photos and scans into one PDF.
- PDF to JPGSave each PDF page as an image.
- HEIC to JPGConvert iPhone HEIC photos to JPG.
- Duplicate Line RemoverRemove duplicate lines, keep order.
- URL Slug GeneratorTurn a title into an SEO-friendly slug.
Why these tools
Every tool on this site is built to run entirely in your browser. That means your data never leaves your device, results appear instantly, and the tool works even offline. No signup, no paywall, no waiting.
Whether you're working out a loan EMI, converting an image, deduplicating a list or generating a clean URL slug, there is a free tool here that does it in seconds.
Popular tool categories
ToolCubby groups its free tools into five simple categories, so you can jump straight to what you need:
- Calculators — EMI, percentage, BMI, discount, age, loan and savings calculators that work out the numbers in a few seconds.
- Image tools — convert between WebP, PNG, JPG and HEIC, compress or resize a photo, and turn an image into a PDF, all on your own machine.
- PDF tools — merge and split documents, delete or reorder pages, compress a file that is too big to email, and convert between PDF and JPG — all in your browser, with the file never leaving your device.
- Text tools — count words, sort lines, remove duplicates, reverse text, change case and clean up lists in a couple of clicks.
- URL tools — URL encode and decode, turn a title into a clean SEO slug, parse a query string and validate a link.
How the tools work
Every tool is entirely client-side. The page loads once, and then all of the processing happens on your device using your browser's own engines — including the canvas API for image work and built-in JavaScript for calculations. Nothing you upload, paste or type is ever sent to a server, so your content stays private and the result usually appears instantly.
That design also means the tools stay light. There are no accounts, no usage limits, no upload queues and no paywall. Open a tool, get your answer, close the tab. On any modern browser on desktop, tablet or mobile, the experience is the same.
Free online tools FAQ
Are these online tools free?
Yes. Every calculator, converter and text tool on ToolCubby is completely free with no signup, no limits and no paywall.
Do you upload or store my data?
No. All tools run entirely in your browser, so the text, images and numbers you use are never uploaded, stored or seen by us.
Do the tools work on mobile?
Yes. Every tool works in any modern browser on desktop, tablet and mobile.
What tools are available?
ToolCubby has calculators (EMI, percentage, BMI and more), image converters and compressors, text tools (dedupe, sort, count) and URL tools (encoder, slug generator, parser).