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Free Miscellaneous Online Tools

A collection of useful developer and utility tools that do not fit neatly into one category. Base64 encoding, password generation, MD5 hashing, color format conversion, QR code creation, credit card validation, and browser detection — all in one place.

These tools are used by developers, content creators, and everyday users. Whether you need to encode text for an API, generate a secure password, inspect your browser's user agent, or convert a hex color to RGB — each tool runs entirely in your browser with no data sent anywhere.

Base64 EncodeEncode any text or binary data to Base64 string format.Base64 DecodeDecode any Base64 string back to readable text or JSON.Password GeneratorGenerate cryptographically random, strong passwords of any length.MD5 Hash GeneratorGenerate the MD5 hash of any text string for checksums.Color ConverterConvert colors between HEX, RGB, RGBA, HSL, HSLA, and CMYK.HEX to RGBConvert HEX color codes to RGB and RGBA values.RGB to HEXConvert RGB or RGBA color values to 6/8-digit HEX codes.QR Code GeneratorGenerate QR codes for URLs, text, email, phone, SMS. Download PNG.QR Code DecoderUpload a QR code image and decode its content instantly.Credit Card GeneratorGenerate Luhn-valid test card numbers for Visa, Mastercard, Amex.Credit Card ValidatorValidate any card number using the Luhn algorithm and detect card type.What Is My BrowserDetect your browser name, version, and operating system.What Is My User AgentView your full browser User-Agent string with parsed breakdown.What Is My Screen ResolutionDetect screen resolution, viewport, DPR, and colour depth.Screen Resolution SimulatorPreview how a website looks at any screen size or device resolution.Facebook ID FinderFind the numeric Facebook ID for any profile, page, or group.SRT to VTT ConverterConvert subtitle files from SRT format to WebVTT format.VTT to SRT ConverterConvert WebVTT subtitle files back to SRT format.URL OpenerOpen multiple URLs at once in new browser tabs.

Frequently Asked Questions

Is Base64 encoding the same as encryption?

No. Base64 is encoding — it converts binary data to a text-safe format. Anyone can decode it without a key. Never use Base64 as a security measure.

Is the password generator secure?

Yes. Passwords are generated using window.crypto.getRandomValues() — a cryptographically secure random number generator. The password is never sent to any server.

Can I use the credit card generator for real purchases?

No. Generated card numbers pass the Luhn algorithm (structural validation) but are not connected to any bank account. They are for testing and development only.

What color formats does the Color Converter support?

HEX, RGB, RGBA, HSL, HSLA, and CMYK. Enter any format and all others update instantly.