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3633 apps · Showing 961–1056
Video & Audio
141 appsVideo & Audio: Text & overlays
Video & Audio: Create & inspect
Video · MixCreate Audio Spectrum VideoTurn an audio file into a polished spectrum animation with the original sound attached.Video · MixCreate Audio Waveform VideoTurn an audio file into a shareable video with an animated waveform and the original sound.Video · GenerateCreate Photo SlideshowArrange up to twelve images, set the pace, and create one clean video with gentle motion.Video · AnalyzeCreate Video ThumbnailCapture a sharp JPG from an exact moment for covers, posts, and previews.Video · ExtractExtract Frames from VideoExport JPG frames at a chosen interval and download the checked set in one ZIP.Video · ConvertImage to VideoTurn a JPG, PNG, WebP, or AVIF into a playback-ready video with a gentle zoom option.Video · CheckInspect Video MetadataRead container, codec, dimensions, frame rate, duration, audio, subtitle, and tag details in one report.
Video & Audio: Convert
Video & Audio: Audio Analysis
Audio / PNG · ConvertAudio Spectrogram LabSee the frequencies in an audio file over time. Compare spectrogram settings and download charts for closer study.Audio / CSV · ConvertMusic Tempo & Beat ExplorerEstimate a recording's tempo in beats per minute. Check beat marks on its waveform and download their times.
Video & Audio: Music & Sound
ABC / SVG / MIDI · ConvertABC Notation EditorWrite ABC music notation and see the score. Listen to the tune and download ABC, SVG or MIDI files.Local sound loops · ConvertAmbient Sound MixerMix your own sound loops. Set each volume, choose which clips repeat and use a sleep timer to stop playback.Waveform / CSV / JSON · ConvertAudio Clip MarkerMark clips on an audio waveform. Set exact start and end times, listen to each section and save the timestamps.Features / Charts / CSV · ConvertAudio Feature ExplorerExplore changes in an audio recording. See charts of sound level and frequency features, then download the measured values.ABC / SVG / MIDI · ConvertFolk Tune TransposerTranspose an ABC folk tune to a new key. Preview the score, listen to the result and download the rewritten tune.Listening practice · ConvertInterval Ear TrainerPractise hearing the distance between two notes. Choose your musical intervals, listen and check your answers.Live filters / Pan / Echo · ConvertLive Audio Effects PlaygroundTry live effects on an audio file. Adjust volume, filters, left-right balance and echo while listening to the result.MIDI · ConvertMIDI Piano-Roll InspectorOpen a MIDI file and see its notes on a piano roll. Explore tracks and tempo changes, listen and export note data.MIDI · ConvertMIDI TransposerMove MIDI notes up or down in pitch. Choose tracks and note ranges while keeping timing and other MIDI events.Chapters / VTT / CSV · ConvertPodcast Chapter EditorAdd chapters to a podcast while you listen. Name each chapter, adjust its time and download the chapter list.Notation / Tap timing · ConvertRhythm Reading TrainerPractise reading and tapping musical rhythms. Listen to a pattern, tap along and see how close your timing was.Notes / Chords / JSON · ConvertScale & Chord FinderFind notes and chords in major and minor scales. See them on a keyboard and listen to each scale or chord.ABC / SVG / MIDI · ConvertSheet Music Snippet MakerMake a short piece of sheet music from notes and durations. Choose the clef, time signature and tempo, then save the score.Sound pads / Shortcuts · ConvertSoundboard BuilderMake a soundboard from your own audio clips. Name each pad, set volumes and play sounds with buttons or keyboard shortcuts.Left / Right / Both · ConvertStereo Channel TesterTest your left and right audio channels. Play a tone, adjust its pitch and run an automatic channel check.Comparative features / CSV · ConvertTimbre Comparison ToolCompare the tone and sound level of two recordings. View matching charts and download their measured differences.
Video & Audio: Music Practice
Live pitch / Hz · ConvertMicrophone Instrument TunerTune a single instrument note using your microphone. See the nearest note, frequency and cents sharp or flat with standard A4 = 440 Hz tuning.Live audio · ConvertMusic Practice MetronomePractise with a steady beat from 30 to 240 BPM. Choose quarter, eighth or sixteenth notes, adjust the volume, and follow the visual beat markers.
Video & Audio: On-Device AI
Video & Audio: Sessions & Timers
Video & Audio: Subtitles
SRT / VTT · ConvertSRT ↔ VTT ConverterConvert subtitle timestamps between SubRip and WebVTT and download the new subtitle file.CSV · ConvertSubtitle Language WorksheetTurn subtitles into a study worksheet with timestamps, original lines, and space for your translation.SRT / VTT · ConvertSubtitle Overlap CheckerFind overlapping subtitle cues and short gaps in an SRT or WebVTT file.SRT / VTT · ConvertSubtitle Reading Speed CheckerMeasure characters per second for every subtitle cue and find lines that may be too fast to read.
Data & Calculators
1770 appsData & Calculators: Functions & Curves
Data & Calculators: Compare Data
PNG · CreateBubble Chart MakerCompare x, y, and size at once, with labels and groups that make every bubble easy to inspect.PNG · CreateCSV Scatter Plot MakerPaste x and y values, colour points by group, and spot clusters, gaps, and unusual results.PNG · CreateError Bar Chart MakerPlot measured values with plus-or-minus error bars so uncertainty stays visible beside each result.PNG · CreateMulti-Series Line Chart MakerDraw one or more ordered lines from CSV data and compare how each series rises or falls.
Data & Calculators: Distributions
PNG · CreateBox Plot MakerCompare medians, quartiles, ranges, and unusual points across one or more groups.PNG · CreateHistogram MakerGroup measurements into bins and see where values gather, spread out, or form more than one peak.PNG · CreateViolin Plot MakerShow the full density shape of grouped measurements while keeping the median and inner box visible.
Data & Calculators: Grids & Fields
PNG · Analyze2D Density Contour Plot MakerEstimate where x and y observations gather and show their density as filled contour bands.PNG · CreateContour Plot MakerTurn gridded measurements into smooth contour bands that reveal peaks, valleys, and boundaries.PNG · CreateMatrix Heatmap MakerConvert row, column, and value data into a colour grid with hover values and a clear scale.
Data & Calculators: 3D Science
PNG · Create3D Scatter Plot MakerPlot x, y, and z values in a rotatable space, then colour groups and inspect point labels.PNG · Create3D Surface Function PlotterType a two-variable formula and rotate a smooth 3D surface to inspect peaks, bowls, waves, and saddles.PNG · Create3D Vector Field MakerDraw vectors from x, y, z positions with u, v, w direction values in a rotatable cone field.
Data & Calculators: Special Coordinates
PNG · CreatePolar Plot MakerTurn angle and radius values into circular traces for direction, cycles, and radial measurements.PNG · CreateRadar Chart MakerCompare several profiles across the same named categories with clear filled radar shapes.PNG · CreateTernary Plot MakerPlot three values that form a whole, such as material blends, soil mixes, or survey shares.
Data & Calculators: Finance & Change
Data & Calculators: Many Variables
PNG · AnalyzeCorrelation Matrix HeatmapCalculate pair-by-pair correlations across numeric columns and see strong positive or negative links.PNG · AnalyzeParallel Coordinates Plot MakerTurn each numeric column into an axis and follow every row across a high-dimensional profile.PNG · AnalyzeScatter Plot Matrix MakerBuild a grid of scatter plots so every numeric column can be compared with every other column.
Data & Calculators: Math Calculators
Calculator · Calculate30–60–90 Triangle from a Known MeasurementCalculate 30–60–90 triangle from a known measurement with retained unit controls, positive geometric roots and explicit inverse-branch assumptions.Calculator · Calculate45–45–90 Triangle Equal Legs and SizeCalculate 45–45–90 triangle equal legs and size with retained unit controls, positive geometric roots and explicit inverse-branch assumptions.Calculator · CalculateAbsolute Value of a Real NumberFind a real number’s nonnegative distance from zero.Calculator · CalculateAcute-Branch Rhombus Area, Diagonals and HeightCalculate acute-branch rhombus area, diagonals and height with retained unit controls, positive geometric roots and explicit inverse-branch assumptions.Calculator · CalculateAntilog & Logarithm with a Chosen BaseConvert a logarithm value back to its number with a positive base, or recover the logarithm from the number.Calculator · CalculateArccosine Principal Angle & Cosine RatioFind the principal angle for a cosine ratio, or solve the ratio from an angle between 0° and 180°, with nine angle units.Calculator · CalculateArcsine Principal Angle & Sine RatioFind the principal inverse sine angle from a ratio, with negative angles, reverse entry and degrees, radians, turns or arc units.Calculator · CalculateArctangent Value and Principal Angle ConversionNo. It selects one principal angle in the open interval from −π/2 to π/2. Tangent repeats periodically, but angles outside this branch are rejected in the backward control.Calculator · CalculateArea CalculatorCalculate area and perimeter for rectangles, circles, triangles, trapezoids, and ellipses.Calculator · CalculateAverage CalculatorCalculate arithmetic mean, median, sum, count, minimum, and maximum for a list of numbers.Calculator · CalculateBase, Exponent and Power with Inverse InputsBase, Exponent and Power with Inverse Inputs. Evaluate a real power or principal root, with reverse inputs where a unique solution exists.Calculator · CalculateBasic CalculatorEvaluate arithmetic with parentheses, powers, percentages, and standard operator precedence.Calculator · CalculateBig Number CalculatorPerform exact arithmetic on integers larger than JavaScript's ordinary safe-number range.Calculator · CalculateBinary CalculatorPerform exact arithmetic on binary integers and convert the result to decimal and hexadecimal.Calculator · CalculateBinary Logarithm & Power of TwoFind log₂(x) for a positive number, or recover x from its base-two logarithm.Calculator · CalculateCartesian & Polar Coordinates in Both DirectionsConvert x/y coordinates to radius and angle, or radius and angle to x/y, with quadrant-aware angles and selectable angle units.Calculator · CalculateCartesian Distance Between Two Spatial PointsNo. This workflow retains the six coordinate inputs and a read-only distance result. A distance equation can have reflected coordinate solutions, which this tool does not select.Calculator · CalculateCartesian Point Distance and Positive-Branch CoordinatesThe solver adds the positive square root to the other point’s matching coordinate. A reflected point can have the same distance. The requested distance must be at least either known axis separation.Calculator · CalculateCentral Angle from Arc Length and RadiusYes. This model divides positive arc travel by radius and keeps the accumulated angle. It does not reduce the result to a minor arc or one revolution.Calculator · CalculateChoose k from n: Binomial CountCount unordered selections of k distinct objects from n, without replacement.Calculator · CalculateCircle Arc Length with Sector Area and Chord ControlsCalculate circle arc length with sector area and chord controls with retained unit controls, positive geometric roots and explicit inverse-branch assumptions.Calculator · CalculateCircle Boundary Length and Enclosed AreaCircumference measures boundary length and uses length units. Enclosed area measures the disk and uses squared length units. Both can determine the positive radius of the same circle.Calculator · CalculateCircle Boundary Length from Radius or DiameterCalculate circle boundary length from radius or diameter with bidirectional inputs, compatible units and clear geometric assumptions.Calculator · CalculateCircle CalculatorFind diameter, circumference, area, and equations from a circle radius.Calculator · CalculateCircle Center from Standard, General or Parametric FormFind a circle’s center from one of three equation forms, with explicit coefficient meanings.Calculator · CalculateCircle Diameter and Radius ConversionCalculate circle diameter and radius conversion with bidirectional inputs, compatible units and clear geometric assumptions.Calculator · CalculateCircle Diameter Recovered from AreaCalculate circle diameter recovered from area with bidirectional inputs, compatible units and clear geometric assumptions.Calculator · CalculateCircle Equations, Center, Radius & GeometryConnect a circle’s center and radius with standard, general and parametric coefficients, area and circumference.Calculator · CalculateCircle General ↔ Standard Form CoefficientsConvert the coefficients of a normalized circle equation to or from its center and squared radius.Calculator · CalculateCircle Measurements with a Zero-Radius BoundaryCalculate circle measurements with a zero-radius boundary with bidirectional inputs, compatible units and clear geometric assumptions.Calculator · CalculateCircle Radius from Circumference or Its Pi CoefficientIn full-circumference mode enter 28*pi. In π-coefficient mode enter 28. The coefficient field already supplies the π factor; adding another pi would multiply it twice.Calculator · CalculateCircle Radius Recovered from Boundary LengthCalculate circle radius recovered from boundary length with bidirectional inputs, compatible units and clear geometric assumptions.Calculator · CalculateCircle Radius, Diameter, Boundary and AreaCalculate circle radius, diameter, boundary and area with bidirectional inputs, compatible units and clear geometric assumptions.Calculator · CalculateCircle Radius, Diameter, Circumference and AreaEnter a positive radius, diameter, circumference or area. The other values describe the same circle. Area-to-radius solving uses the positive square root, and length and area use different unit dimensions.Calculator · CalculateCircular Area with Square-Foot Unit ControlsCalculate circular area with square-foot unit controls with bidirectional inputs, compatible units and clear geometric assumptions.Calculator · CalculateCircular Area with Square-Inch Unit ControlsCalculate circular area with square-inch unit controls with bidirectional inputs, compatible units and clear geometric assumptions.Calculator · CalculateCircular Frustum Volume with Perpendicular and Slant HeightCircular Frustum Volume with Perpendicular and Slant Height. Convert compatible units, recover unknown dimensions and distinguish curved surfaces, bases and total measures.Calculator · CalculateCircular Perimeter from Enclosed AreaCalculate circular perimeter from enclosed area with bidirectional inputs, compatible units and clear geometric assumptions.