ToolNestora
Practical online tools that run in your browser
Convert and compress images, work with PDFs, check your SEO, count words, format JSON and run everyday calculators, right in your browser, with no account and no upload.
47 tools · 10 categories · No sign-up · Nothing you enter leaves your browser
Popular tools
- Image CompressorReduce JPG and WebP file size and see the actual savings.Image tools
- Image ConverterConvert between JPG, PNG and WebP with quality and transparency controls.Image tools
- Word CounterCount words, characters, sentences and paragraphs, with reading and speaking time.Text tools
- JSON Formatter & ValidatorValidate JSON with exact error locations, then format, minify or sort it.Developer tools
- Password GeneratorGenerate random passwords of any length with the character types you choose.Security tools
- Percentage CalculatorFind a percentage of a number, a percentage change, an increase or decrease, and more.Calculators
- QR Code GeneratorTurn a link or text into a QR code and download it as a PNG or SVG.Developer tools
- Loan / EMI CalculatorEstimate the monthly payment, total interest and a full repayment schedule.Calculators
- Unit ConverterConvert length, weight, temperature, area, volume, speed, time and data sizes.Converters
New tools
See all 47 tools- NewMortgage CalculatorWork out the monthly payment on a home loan with property tax, insurance and fees added.Finance Calculators
- NewCompound Interest CalculatorSee how savings grow with compound interest and regular monthly deposits.Finance Calculators
- NewSimple Interest CalculatorFind the interest and total on an amount over years, months or days.Finance Calculators
- NewSavings Goal CalculatorFind the monthly deposit or the time needed to reach a savings goal.Finance Calculators
- NewSales Tax CalculatorAdd sales tax to a price, or take it out of a total that includes tax.Finance Calculators
- NewGST and VAT CalculatorAdd or remove GST or VAT, with quick standard rates for several countries.Finance Calculators
Browse by category
- Image tools5 toolsImage Converter, Image Compressor, Image Resizer & Cropper and more
- Text tools4 toolsWord Counter, Character Counter, Case Converter and more
- Developer tools4 toolsJSON Formatter & Validator, Base64 Encoder & Decoder, URL Encoder & Decoder and more
- Security tools1 toolPassword Generator
- Calculators5 toolsPercentage Calculator, Discount Calculator, Age Calculator and more
- Finance Calculators8 toolsMortgage Calculator, Compound Interest Calculator, Simple Interest Calculator and more
- Seller Profit & Fees9 toolsAmazon FBA Fee Estimator, Etsy Fee Calculator, eBay Fee Calculator and more
- Converters1 toolUnit Converter
- SEO tools6 toolsMeta Title & Description Checker, Robots.txt Generator, XML Sitemap Generator and more
- PDF tools4 toolsMerge PDF, Split PDF, Rotate & Delete PDF Pages and more
How the tools are designed
Local processing
The tools run in your browser. Images are processed with the Canvas API and text, data and numbers with JavaScript, so what you enter is not sent to a server.
Honest results
Tools show real sizes, counts and working, including when an output ends up larger than the original, and they say plainly when an input is not valid.
Accessible by default
Keyboard operation, visible focus, labeled controls and clear status messages are part of every tool, on phones and desktops.