Articles
Practical guides for SmartPlusLab online tools.
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How to Generate a Barcode Image with Custom Dimensions
Enter non-empty data, choose a supported barcode format, adjust the requested size or text option if needed, and submit it. A successful generation returns base64-encoded PNG image data, while validation or format problems can return an error indication without an image.
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How to Remove an Image Background from Base64 Data
Provide Base64-encoded image data, use automatic processing or a selected method, and read the successful Base64-encoded PNG with RGBA data. Adjust tolerance when needed, remembering that invalid tolerance values fall back to 32.
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How to Convert AVIF to PNG
Supply AVIF image data and run the conversion; when the data can be opened successfully, the tool returns PNG image data as Base64 text.
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How to Convert AVIF to JPG
Provide valid AVIF image data, optionally set a numeric JPEG quality value, and start the conversion. A successful result is JPEG data represented as base64 text.
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How to Extract Audio from a Video
Convert the media to Base64, provide the encoded value, choose a supported format, and start extraction. The operation uses the first audio stream and selects MP3 when no format is specified, provided processing prerequisites are available.
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How to Calculate Aspect Ratio From Width and Height
Enter positive width and height values to get a reduced aspect ratio, decimal ratio, orientation, and supported ratio descriptions. Remember that the calculator converts inputs to integers before calculating.
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How to Generate ASCII Art from Text
Enter nonempty text, optionally select a font, and run the renderer to turn the phrase into ASCII art. A blank value produces no artwork, while some inputs or font selections can return an unsuccessful result.
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How to Convert Area Values Between Square Units
Enter the area number, identify its source unit, select a supported destination unit, and run the conversion. The returned area is rounded to 10 decimal places.
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How to Convert Angle Values Between Units
Enter the angle, choose the unit it currently uses, choose the unit you need, and run the conversion. The tool returns a numeric result in the target unit, rounded to 10 decimal places.
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How to Encrypt and Decrypt Text with the AES Cipher Tool
Enter your text and password, choose encryption or decryption, and run the tool. Encryption returns a URL-safe Base64 token; decryption needs that complete token and the same password.
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How to Generate a CSS Border-Radius Declaration
Enter four corner values, select a unit, and generate the CSS `border-radius` declaration. The output preserves the top-left, top-right, bottom-right, and bottom-left order.
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How to calculate ROI and read the result
Calculate ROI by subtracting the initial investment from the final value, dividing that profit or loss by the initial investment, and converting the result to a percentage.