Kastavo

Free online tools

PDF, images, video, text, calculators and more. Everything is processed right in your browser — no upload, no sign-up.

e.g. merge PDF

103
free tools: 12
categories: 3
languages

Popular tools

ImageCompress ImageReduce a JPG or WebP file size with quality control; PNG is only re-encoded.TextWord and Character CounterCount words, characters, lines, and paragraphs in real time, right in your browser.PDFMerge PDFMerge several PDFs into one document, in any order.DevelopmentJWT DecoderDecode a JWT and see its header, payload, and expiration — without verifying the signature.FinancialCompound Interest CalculatorCalculate compound interest with monthly contributions.ColorsColor PickerPick a color and see HEX, RGB and HSL instantly.ConvertersLength ConverterConvert length between meter, km, mile, foot, and inch.ValidatorsBrazilian CPF ValidatorValidate a Brazilian CPF instantly.Video EditingCompress Video OnlineShrink a video's file size by choosing resolution and quality.CalculatorsPercentage CalculatorCalculate percentages: what X% of Y is, increases, discounts, and more.GeneratorsQR Code GeneratorGenerate QR Codes for text, links, Wi-Fi, Pix, vCard, SMS and more, free.BusinessFreelance Hourly Rate CalculatorFind what to charge per hour and project to hit your income goal.

Categories

ImageEdit and convert images.

PDFMerge, split, convert PDFs.

DevelopmentHandy tools for developers.

ConvertersConvert units.

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Don't take our word for ittest it yourself

Kastavo has no server processing your files. Turn your internet off and try: most tools keep working.

See how to check it

What's new

4 new tools (Chmod Calculator, .env Formatter, Hex to Text Converter and Watermark PDF), plus the new Blog, the Privacy page and a refreshed look.

See everything that's new

Why use Kastavo?

100% free

Every tool is free, with no sign-up. Where there is a file size limit, it is shown on the tool itself.

Fast and straightforward

Fast results, right in your browser, nothing to install.

Always growing

We add new tools regularly, so the catalog keeps growing.

Multiple languages

Content in Portuguese, English and Spanish, with units and formats for your language.

Didn't find the tool you needed?

Tell us which tool you'd like to see on Kastavo.

A solo project by Michel Davi, with new tools added regularly.

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