INI to JSON Converter
Parse simple INI sections and key/value assignments into JSON.
DeveloperOpen tool ↗THE FEUTEX TOOLKIT
Tools for everyday tasks · Page 3
Find the right tool for your task. Search by name or file format, save favorites and pick up where you left off.
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1444 tools
PEM Block Inspector
Inspect PEM labels and decoded byte lengths without interpreting certificate trust.
SecurityOpen tool ↗SSH Public Key SHA256 Fingerprint
Calculate an OpenSSH-style SHA256 fingerprint from a public-key blob.
SecurityOpen tool ↗Text to UTF-8 Hexadecimal
Encode text as space-separated UTF-8 byte values.
EncodingOpen tool ↗UTF-8 Hexadecimal to Text
Decode hexadecimal bytes to text with strict UTF-8 validation.
EncodingOpen tool ↗IPv4 CIDR Membership Tester
Check which IPv4 addresses fall inside a selected CIDR block.
DeveloperOpen tool ↗IPv4 Log Address Masker
Mask the final octet of valid IPv4 addresses found in text.
SecurityOpen tool ↗Email Local-Part Masker
Replace common email local parts with a fixed marker while retaining domains.
SecurityOpen tool ↗Clock Duration to Seconds
Convert HH:MM:SS durations to total seconds with strict ranges.
CalculatorsOpen tool ↗Semantic Version Comparator
Compare semantic versions using numeric prerelease precedence and ignoring build metadata.
DeveloperOpen tool ↗cURL to Fetch Converter
Convert a constrained cURL command into a fetch call without executing it.
DeveloperOpen tool ↗Parameterized SQL Insert Builder
Generate an INSERT statement and separate parameter values from a JSON record array.
DeveloperOpen tool ↗CSV to Markdown Table
Render rectangular CSV data as an escaped Markdown table.
TextOpen tool ↗Timestamp Interval Calculator
Calculate elapsed time between two explicitly timezone-qualified ISO timestamps.
CalculatorsOpen tool ↗Rectangle Area Calculator
Calculate rectangle area with labeled inputs, explicit units and the formula A = width × height.
GeometryOpen tool ↗Rectangle Perimeter Calculator
Calculate rectangle perimeter with labeled inputs, explicit units and the formula P = 2(width + height).
GeometryOpen tool ↗Rectangle Diagonal Calculator
Calculate rectangle diagonal with labeled inputs, explicit units and the formula d = √(width² + height²).
GeometryOpen tool ↗Triangle Area Calculator
Calculate triangle area with labeled inputs, explicit units and the formula A = base × perpendicular height / 2.
GeometryOpen tool ↗Triangle Area from Three Sides Calculator
Calculate triangle area from three sides with labeled inputs, explicit units and the formula A = √[s(s−a)(s−b)(s−c)], s = (a+b+c)/2.
GeometryOpen tool ↗Right Triangle Missing Leg Calculator
Calculate right triangle missing leg with labeled inputs, explicit units and the formula b = √(c² − a²).
GeometryOpen tool ↗Circle Area Calculator
Calculate circle area with labeled inputs, explicit units and the formula A = πr².
GeometryOpen tool ↗Circle Circumference Calculator
Calculate circle circumference with labeled inputs, explicit units and the formula C = 2πr.
GeometryOpen tool ↗Circle Sector Area Calculator
Calculate circle sector area with labeled inputs, explicit units and the formula A = πr²θ / 360.
GeometryOpen tool ↗Arc Length Calculator
Calculate arc length with labeled inputs, explicit units and the formula s = πrθ / 180.
GeometryOpen tool ↗Circle Chord Length Calculator
Calculate circle chord length with labeled inputs, explicit units and the formula c = 2r sin(θ/2).
GeometryOpen tool ↗Annulus Area Calculator
Calculate annulus area with labeled inputs, explicit units and the formula A = π(R² − r²).
GeometryOpen tool ↗Ellipse Area Calculator
Calculate ellipse area with labeled inputs, explicit units and the formula A = πab.
GeometryOpen tool ↗Trapezoid Area Calculator
Calculate trapezoid area with labeled inputs, explicit units and the formula A = (a+b)h/2.
GeometryOpen tool ↗Parallelogram Area Calculator
Calculate parallelogram area with labeled inputs, explicit units and the formula A = bh.
GeometryOpen tool ↗Rhombus Area from Diagonals Calculator
Calculate rhombus area from diagonals with labeled inputs, explicit units and the formula A = d₁d₂/2.
GeometryOpen tool ↗Regular Polygon Area Calculator
Calculate regular polygon area with labeled inputs, explicit units and the formula A = ns² / [4 tan(π/n)].
GeometryOpen tool ↗Regular Polygon Interior Angle Calculator
Calculate regular polygon interior angle with labeled inputs, explicit units and the formula θ = 180(n−2)/n.
GeometryOpen tool ↗Cuboid Volume Calculator
Calculate cuboid volume with labeled inputs, explicit units and the formula V = length × width × height.
GeometryOpen tool ↗Cuboid Surface Area Calculator
Calculate cuboid surface area with labeled inputs, explicit units and the formula A = 2(lw + wh + lh).
GeometryOpen tool ↗Cuboid Space Diagonal Calculator
Calculate cuboid space diagonal with labeled inputs, explicit units and the formula d = √(l²+w²+h²).
GeometryOpen tool ↗Cylinder Volume Calculator
Calculate cylinder volume with labeled inputs, explicit units and the formula V = πr²h.
GeometryOpen tool ↗Closed Cylinder Surface Area Calculator
Calculate closed cylinder surface area with labeled inputs, explicit units and the formula A = 2πr(r+h).
GeometryOpen tool ↗Cone Volume Calculator
Calculate cone volume with labeled inputs, explicit units and the formula V = πr²h/3.
GeometryOpen tool ↗Closed Cone Surface Area Calculator
Calculate closed cone surface area with labeled inputs, explicit units and the formula A = πr[r + √(r²+h²)].
GeometryOpen tool ↗Sphere Volume Calculator
Calculate sphere volume with labeled inputs, explicit units and the formula V = 4πr³/3.
GeometryOpen tool ↗Sphere Surface Area Calculator
Calculate sphere surface area with labeled inputs, explicit units and the formula A = 4πr².
GeometryOpen tool ↗Pyramid Volume Calculator
Calculate pyramid volume with labeled inputs, explicit units and the formula V = base area × height / 3.
GeometryOpen tool ↗Cone Frustum Volume Calculator
Calculate cone frustum volume with labeled inputs, explicit units and the formula V = πh(R²+Rr+r²)/3.
GeometryOpen tool ↗Torus Volume Calculator
Calculate torus volume with labeled inputs, explicit units and the formula V = 2π²Rr².
GeometryOpen tool ↗Reverse Percentage Calculator
Calculate reverse percentage with labeled inputs, explicit units and the formula original = final / (1 + change/100).
MathOpen tool ↗Linear Interpolation Calculator
Calculate linear interpolation with labeled inputs, explicit units and the formula y = y₁ + (x−x₁)(y₂−y₁)/(x₂−x₁).
MathOpen tool ↗Line Slope Calculator
Calculate line slope with labeled inputs, explicit units and the formula m = (y₂−y₁)/(x₂−x₁).
MathOpen tool ↗Distance Between Two Points Calculator
Calculate distance between two points with labeled inputs, explicit units and the formula d = √[(x₂−x₁)²+(y₂−y₁)²].
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