CSV to JSON and JSON to CSV converter
Convert quoted CSV records into a JSON array or export a JSON object array as CSV without losing leading-zero text.
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Find a little clarity. Search by name, or pick a category.
Something new: Internet speed test → Check your connection with a speedometer and a running bunny.
Showing 625–648 of 743 tools · Page 27 of 31
Website favicon HTML code generator
Generate an escaped favicon link tag for an existing SVG PNG or ICO image path.
Open toolCSS px rem and em converter
Convert CSS lengths using separate root-font and element-context references instead of assuming every em equals one rem.
Open toolrobots.txt file generator
Prepare a simple all-crawler policy with optional path exclusions and an absolute sitemap URL.
Open toolDummy names and email data generator
Create reproducible fictional name and reserved-domain email fixtures in text CSV or JSON format.
Open toolYouTube thumbnail URL finder
Find direct image URLs for common thumbnail resolutions from a YouTube video URL or video ID.
Open toolUnicode strikethrough and underline text generator
Make copyable text using combining strikethrough underline double-underline or combined marks.
Open toolZalgo combining text generator
Add repeatable decorative combining marks with bounded intensity and a reproducible seed.
Open toolBulk URL opener with reviewed tab batches
Validate a URL list and explicitly open up to twenty links at a time while retaining individual link access.
Open toolDiscrete expected value and variance calculator
Build a finite probability distribution and inspect each outcome’s exact contribution to its expected value.
Open calculatorFraction simplifier with exact reduction steps
Reduce an integer numerator and denominator to lowest terms while preserving the value and explaining the decimal form.
Open calculatorFraction to decimal converter with repeating blocks
Convert an exact integer fraction to a terminating decimal or an explicitly marked recurring expansion.
Open calculatorFinite decimal to exact fraction converter
Turn a finite decimal string into a power-of-ten fraction and reduce it without floating-point guessing.
Open calculatorMixed number to improper fraction converter
Combine whole units and a fractional remainder with an explicit sign for the entire value.
Open calculatorSquare root and cube root radical simplifier
Extract perfect square or cube factors from an integer and compare the exact radical with its real decimal approximation.
Open calculatorArea and perimeter calculator for classroom shapes
Compare enclosed area and boundary length for a rectangle square circle or right triangle with a proportional SVG sketch.
Open calculatorAngle type identifier and degree to radian calculator
Classify an angle from zero to a full turn and see its counterclockwise rays and arc.
Open calculatorSimple probability calculator for coins dice and counts
Explore fair coin and six-sided die events or supply equally likely favorable and total outcome counts.
Open calculatorMissing value proportion solver with exact fractions
Solve one unknown position in a/b = c/d and distinguish unique solutions from invalid or undetermined cases.
Open calculatorSales tax percentage calculator for students
Practice finding an entered tax percentage and adding it to a price with the arithmetic shown.
Open calculatorMatrix transpose calculator for rectangular matrices
Swap rows and columns of a bounded exact rational matrix and inspect the resulting dimensions.
Open calculatorSurface area calculator for cube prism and cylinder
Add the exterior face areas of a cube rectangular prism or closed cylinder and compare surface area with enclosed volume.
Open calculatorBody frame ratio and measured somatotype calculator
Compare a legacy height-to-wrist ratio with the separate ten-measurement Heath–Carter anthropometric method.
Open calculator2021 CKD-EPI eGFR calculator
Estimate indexed adult eGFR from serum creatinine with race-free 2021 CKD-EPI coefficients and explicit laboratory units.
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