2,871 tools
3D studio tools
307 and growing Channel CAC Allocator CAC by channel, average and at the margin. 
Unit Economics Payback Calculator One customer's cash curve, to the payback month. 
Revenue Retention Bridge Every month's revenue change, bridged exactly. 
Retention Forecaster Retention projected past your data, with honest bands. 
Product Schema Builder Product markup built and checked, field by field. 
CVSS Score Calculator Vector strings scored exactly by the spec. 
Cohort Analysis Builder Retention from your own data, honestly censored. 
Hypothesis Test Visualizer Exact p-values you can see on the curve. 
Video Metadata Viewer What is really inside the video file. 
Envelope Address Formatter Addresses to standard, barcode encoded, true size. 
Time Card Calculator Exact hours across midnight and clock changes. 
Color Blindness Palette Checker Every color pair measured, for every eye. 
XLSX to CSV Converter Your workbook as CSV, dates and gaps intact. 
JSON Schema Validator Every error at its exact path, by the real rules. 
World Building Bible and Consistency Checker Your world, your calendar, no contradictions. 
Long-Tail Query Explorer The long tail that is really in your data. 
Content Calendar with Recurring Posts Repeat rules done right, clashes found. 
Complaint Letter with Evidence Index A dated timeline and fingerprinted evidence. 
Meeting Minutes from Your Transcript Every decision and action tied to its moment. 
Memo Builder with Format Checks Numbering, enclosures and recipients that add up. 
Press Release Builder and Fact Checker Every figure, date and embargo time checked. 
Cover Letter and Job Posting Checker Your letter against the posting, line by line. 
Email Signature Builder and Checker Clean HTML, plain text and a vCard, all checked. 
CONTRIBUTING.md Generator Every command in it is one your project runs. 
Changelog Generator from Git Log From commits to a checked changelog and version. 
Commit Message Builder and Checker Proposed from the diff, checked against the spec. 
README Generator from Your Project Your manifest, your scripts, your README. 
Purchase Price Allocation Calculator Goodwill and the residual method, reconciled. 
Light Year Distance Calculator Exact definitions, every digit shown. 
Cam Profile Designer Pick the motion, check the angles, cut the cam. 
Box Plot Builder Say which quartiles you used, then draw them. 
Black-Scholes Option Calculator Model value, Greeks and implied volatility, checked. 
Audio Waveform Viewer Every peak at every zoom, plus the spectrum. 
AST Explorer Click the code, see the node; click the node, see the code. 
Fluid Flow Simulator Draw an obstacle, watch the wake form. 
Favicon Maker and Preview One picture in, every icon size out. 
Video to GIF Converter Pick the moment, see the size, save the GIF. 
Audio Reverb and Echo Hear the room you dial in, then save it. 
Audio Noise Reducer Learn the noise, then take it out gently. 
WKT Geometry Viewer Paste the text, see the shape, check it. 
STL to OBJ Converter Welded vertices, not a triangle soup. 
Batch Image Converter Many pictures in, one tidy ZIP out. 
City Distance Calculator As the crow flies, measured on the ellipsoid. 
Dollar-Cost Averaging Calculator Your prices in, no invented history. 
Satellite Pass Predictor Real orbit math from current elements. 
Webhook Signature Checker Find out why a signature does not match. 
OpenPGP Key Lookup Every field read from the key itself. 
IP Address Lookup Who holds the block, from the registry itself. 
Domain Registration Lookup The registry's own record, not an estimate. 
Reference Rate Currency Converter Dated reference rates, never a made-up quote. 
Dockerfile Linter Every finding with its reason and a fix. 
Search Click Curve Builder Your own curve, from your own clicks. 
Newsletter Value Calculator Your numbers in, every formula shown. 
Email A/B Test Calculator How many to send, and what the result means. 
CVE Lookup One CVE, every field explained. 
DNS Record Lookup Ask two resolvers, compare the answers. 
JWT Debugger Real signatures, checked on your device. 
Breached Password Check Only five characters of a hash ever leave. 
VPN Leak Check What a website really sees behind your VPN. 
Compound Interest Calculator Interest on interest, with the formula shown. 
Invoice Generator Exact money maths, a clean PDF. 
JSON Formatter and Validator Exact errors, numbers kept as written. 
Password Generator Random done right, with the maths shown. 
SCSS to CSS Compiler The real Sass compiler, on your device. 
Story Point Estimator Hidden votes, honest ranges. 
Brand Voice Checker Your style guide, applied to every draft. 
Hash and Checksum Generator Check a download against its published hash. 
Landing Page Builder One page, your words, a file you own. 
Video Tag Builder A short, tidy tag list, most important first. 
Header Collage Maker Several pictures, one clean wide strip. 
Profile Banner Maker A calm strip behind your name, made from a seed. 
Cover Photo Crop Planner One picture, many crops, nothing important lost. 
Quote and Stat Card Maker One quote or one number, set properly and sourced. 
Tall Pin Maker A tall page that reads from the top down. 
Video Thumbnail Maker If it reads at postage-stamp size, it works. 
Co-occurrence Term Finder Related terms measured from your texts, not guessed. 
Local Content Planner What only someone who works here could write. 
Activity Notice Builder Real numbers, or no notice at all. 
Testimonial Block Builder Real words from real customers, marked up properly. 
Giveaway Rules Builder A draw you could show your working for. 
Caption Builder A first line worth the tap, and a clear last one. 
Profile Bio Builder Who you are, what you do, what to do next. 
Profile Bio Fitter One bio, cut to fit every box. 
Magic Square Generator Every row, column and diagonal, one sum. 
Union-Find Visualizer Who is connected to whom, answered almost for free. 
Floating-Point Explorer The number you typed, and the one you got. 
Convex Hull Visualizer A rubber band snapped around the points. 
Edit Distance Visualizer The fewest changes from one word to another. 
Trie Autocomplete Visualizer Words that begin alike share the road. 
B-Tree Visualizer Wide, shallow, and always balanced. 
Bloom Filter Visualizer Probably yes, definitely no. 
Video Description Builder Chapters that parse, and a first line that counts. 
Review Reply Builder A reply you would be glad to have signed. 
Local Phrase Builder Your services, in the places you actually work. 
Guest Post Pitch Builder A pitch an editor can answer in one read. 
Exit Message Builder One message, asked once, easy to dismiss. 
Bio Link Page Builder One small page of links that is entirely yours. 
Ad Extras Planner The small lines under the ad, planned on one sheet. 
Ad Copy Variations Builder Every pairing of your lines, checked before you paste. 
Waiting Line Simulator A little busier, a lot more waiting. 
Catenary Curve Calculator The shape a chain chooses for itself. 
LZ77 Compression Visualizer Say it once, then point back at it. 
Karnaugh Map Solver Group the ones. Keep only what you need. 
Hamming Code Visualizer Flip a bit. The code tells you which one. 
Finite Automaton Builder What a pattern becomes when a machine reads it. 
Binary Heap Visualizer A tree that lives in an array. 
Hash Table Visualizer Where a key lands, and what it bumps into. 
Long-Tail Phrase Builder Specific phrases from the words you know. 
Negative Keyword List Builder Find the searches you never meant to show up for. 
Funnel Chart Builder Where people leave, drawn to scale. 
Review Link QR Builder A code that scans, on a card that prints. 
Email Signature Maker A signature people can read, click and copy. 
Web Banner Maker One design, every size, exact pixels. 
Meme Generator Your picture, your caption, never uploaded. 
Hashtag Workshop Tags that parse, read aloud, and stay yours. 
Crystal Lattice Explorer Fourteen ways to stack a world. 
Image Dither Maker Few colours, placed so the eye fills the rest. 
Continued Fraction Explorer The shortest fractions that come closest. 
Newton Fractal Explorer One rule for finding roots, endless borders. 
Ising Model Simulator Tiny magnets, one dial, a phase transition. 
Percolation Simulator A little more open, and suddenly a way through. 
Diffusion-Limited Aggregation Simulator Wandering particles that build a fern of frost. 
Huffman Coding Visualizer Common letters get short codes. Watch why. 
Keyword Combination Generator Every combination, counted before it is made. 
Email CTA Button Generator A button that survives the inbox. 
Title Tag Workshop A title that fits, says what it is, and is yours. 
GTM Tag Builder Know what fires, when, and why, before you publish. 
GA4 Event Builder Events named once, typed right, sent the same way. 
RSS Feed Builder A feed written properly, tag by tag. 
OG Image Generator The picture a link wears when it is shared. 
UTM Campaign URL Builder Links that say where the click came from. 
Content Brief Builder Everything a writer needs on one page. 
Article Outline Builder The skeleton first, so the writing stands up. 
Random Text Generator Nonsense with rules, repeatable on demand. 
Reverse Text Generator Backwards done properly, emoji and all. 
Fancy Text Generator Borrowed letters, with the fine print shown. 
Text to ASCII Art Generator Big letters built from small ones. 
IP ACL Builder Who gets in, by address, with no surprises. 
Firewall Rule Generator Say it once, get it in four firewall dialects. 
Encrypted QR Code Generator A QR code that keeps its mouth shut. 
Referrer Policy Generator Decide how much of your address the next site sees. 
Permissions Policy Generator Switch off what your pages never use. 
BIMI Record Generator Your logo beside your mail, once the homework is done. 
MTA-STS Policy Generator Tell the world your mail only travels sealed. 
CAA Record Generator A guest list for who may issue your certificates. 
security.txt Generator One small file that tells finders where to knock. 
TOTP QR Code Generator Thirty seconds, six digits, one shared secret. 
2FA Backup Code Generator Spare keys for the day your phone is gone. 
JWT RS256 Key Generator A signing key pair, and proof that it works. 
CSR Generator The request a CA signs, made where the key stays. 
X.509 Certificate Builder A certificate you can read byte by byte. 
RIPEMD-160 Hash Generator Two lines of rounds, one 160-bit answer. 
BLAKE2 Hash Generator A fast hash with a key slot built in. 
SHA-3 Hash Generator The sponge that soaks up data and wrings out a digest. 
Wave Function Collapse Generator Local rules in, a whole map out. 
Quaternion Rotation Visualizer Four numbers that turn anything, without the lock. 
Fourier Epicycle Drawing Machine Any doodle is a stack of spinning circles. 
Langton's Ant Simulator Turn, flip, step. Order arrives unannounced. 
Turing Machine Simulator A tape, a head, a table of rules. That is all. 
Hyperbolic Tiling Explorer Infinite tiles in a finite circle. 
Abelian Sandpile Simulator Four grains is too many, so it spills, and art appears. 
Flag Semaphore Trainer Two flags, eight directions, the whole alphabet. 
Anaglyph 3D Image Maker Two views, two colors, and the picture stands up. 
Traffic Jam Simulator No crash, no roadworks, and still everyone stops. 
Epidemic Curve Simulator Three boxes of people, one curve that rises and falls. 
Aperiodic Monotile Explorer One shape, the whole plane, and never the same twice. 
Ulam Spiral Explorer Primes on a spiral, and stripes nobody ordered. 
Napier's Bones Calculator Multiplication tables on sticks, read along the slant. 
Tower of Hanoi Solver Move the tower, never big on small. 
Knight's Tour and N-Queens Lab One knight, every square. Eight queens, no quarrels. 
Tuning and Temperament Explorer Twelve notes that almost fit, and how we fudge them. 
Sliding Puzzle Maker One empty square, and the picture comes back. 
Chladni Plate Patterns Sand runs to where the plate stands still. 
Galton Board Simulator A thousand random bounces, one bell curve. 
Pop-Up Card Maker Open the card and the paper stands up. 
Boids Flocking Simulator Three small rules, and a flock takes shape. 
Truss Structure Analyzer Push on a bridge and watch every bar answer. 
Word Search Generator Your words, hidden in every direction. 
Wave Interference Simulator Ripples meet, and some of the water stands still. 
Fourier Series Visualizer Square, saw and triangle, built one harmonic at a time. 
Kaleidocycle Maker A paper ring that rolls through its own middle. 
Guilloche Pattern Generator Hair-fine lines woven into rosettes and ribbons. 
Reaction Diffusion Pattern Lab Two chemicals, two numbers, and spots turn to stripes. 
Paper Snowflake Maker Fold, snip, unfold: six arms from one small cut. 
Cross Stitch Pattern Maker Every square a stitch, every symbol a color. 
Sudoku Puzzle Generator Nine digits, one answer, and a reason for every step. 
Morse Code Practice Trainer Dits and dahs, learned by ear at real speed. 
Mandelbrot Set Explorer One short formula, and detail that never ends. 
Picture Logic Puzzle Maker Numbers on the edge, a picture hiding inside. 
Moire Pattern Generator Two fine patterns, one giant ripple. 
Tangram Puzzle Maker Seven pieces, one square, endless shapes. 
Planisphere Maker Turn the wheel to tonight, and the sky lines up. 
Green Screen Remover The green goes, the edges stay clean. 
Drum Pattern Sequencer Sixteen steps, a kick and a snare, and it grooves. 
Vernier Caliper Reading Trainer Find the line that lines up, and the reading follows. 
Paper Marbling Simulator Ink on water, combed into feathers and stone. 
Hexaflexagon Maker A paper hexagon with more faces than it should have. 
Soroban Abacus Trainer One bead for five, four for ones, and sums done by touch. 
Slide Rule Simulator Multiplying by sliding two rulers, the way it was done. 
URL Parser and Builder Every part of a link, read the way a browser reads it. 
Lens Distortion Corrector Lines that should be straight, made straight. 
Photo Metadata Remover The picture stays; where and when you took it goes. 
Metronome Steady time, down to the sample. 
Pentomino Puzzle Solver Twelve pieces, one board, every way they fit. 
Kumihimo Braid Designer Sixteen strands, one move repeated, and a spiral appears. 
Truchet Tile Pattern Maker Two arcs on a square, and a whole maze of curves. 
Binary Search Tree Visualizer Every rotation, one step at a time. 
ASN.1 and Certificate Decoder Every byte of a certificate, named and explained. 
Tuner and Reference Tones Hear the note, or let it hear you. 
Voronoi Stained Glass Maker A picture cut into glass, one cell at a time. 
Lissajous and Harmonograph Figures Two pendulums, one pen, and a curve that fades inward. 
Penrose Tiling Generator Five-fold order that never repeats. 
Weaving Draft Designer Threading, tie-up, treadling, and the cloth they make. 
Image Steganography Tool Hidden in plain sight, and how well it really hides. 
Linear Transformation Visualizer Drag a vector, watch the whole plane follow. 
ND Filter Exposure Calculator Base exposure in, long exposure out, timer ready. 
pH Calculator From concentration to pH, with the working shown. 
Pinhole Camera Designer The right hole, the right box, the right exposure. 
Celtic Knot Generator Place the breaks, and the weave follows. 
Polyhedron Net Maker Flat on paper, folded into a solid. 
Visual Secret Sharing Two sheets of noise that add up to a secret. 
Maze Generator Carve it, solve it, print it, walk it. 
Anamorphic Mirror Art Maker A smear on paper, a picture in the mirror. 
Wind Chime Tube Calculator Cut to length, hung at the node, tuned to a scale. 
Zoetrope Strip Maker Twelve frames, one spin, and it moves. 
Autostereogram Maker A flat pattern with a shape floating inside it. 
Sundial Designer A dial drawn for your latitude, ready to print. 
Base32 Encoder and Decoder Five bits at a time, shown as it happens. 
Image Hash Calculator Same file, same picture, or just similar: three answers. 
Virtual Piano Play, see the notes, keep the take. 
Pendulum Lab From a steady tick to chaos, one extra joint away. 
N-Body Gravity Simulator Gravity, with the bookkeeping shown. 
Lorenz Attractor Explorer Two starts a hair apart, and where they end up. 
Standing Wave Explorer Every harmonic, seen and heard. 
Field of View Calculator See what a lens sees before you buy it. 
Speaker Notes Card Maker Notes you can read at a glance, and time by. 
Pen Tool Trainer Fewer points, smoother curves, scored as you go. 
Image to STL Converter A flat picture becomes a part you can hold. 
ECDSA Signature Tool Sign, verify, and fix the one format mismatch everyone hits. 
Open Source License Generator The right license, in its exact official words. 
Table Number Card Maker A full set of table numbers, folded and standing. 
Character Inspector and Code Table Every character in your text, down to its bits. 
Image to ASCII Art A picture, typed out one character at a time. 
GPS Coordinate Converter Any coordinate format in, every format out. 
Angle Measurement Tool Three points on a photo, and the angle is read. 
Tile Pattern Layout Planner Every tile and every cut, before you open a box. 
Vertical Jump Calculator Two frames of video are enough to measure a jump. 
Vibration Meter What is shaking, how hard, and how fast. 
Bubble Level Your phone, set down, tells you what is level. 
Microphone Oscilloscope See the sound your microphone hears, wave by wave. 
CSS Animation to GIF Exporter Keyframes in, a looping GIF out. 
Knitting Pattern Chart Maker Chart it, read it row by row, see the fabric. 
IDN Homograph Attack Detector Catch the letter that only looks right. 
Property List Converter Binary plist in, readable tree out. 
Image Deskew Tool Crooked scans, set straight. 
Palette from Photo The colors a photo is really made of. 
Cellular Automata Simulator Simple rules, stacked in time, become sculpture. 
Stipple Art Generator A photo, redrawn one dot at a time. 
Solid of Revolution Visualizer Spin a curve, watch the solid, read the volume. 
Contact Sheet Maker A whole shoot on a few sheets of paper. 
Interactive Star Chart The sky above any place, at any moment. 
Tone Generator Any frequency, any shape, clean enough to measure with. 
Tessellation Maker Pull one edge and every tile changes with it. 
Symmetry Group Visualizer Draw once and let the group do the rest. 
Third-Party Cookie Tester A real cross-site test, not a guess from settings. 
RSA-PSS Signature Tool Sign a file, verify a file, and take the keys with you. 
Bookmarklet Generator Write it, test it safely, drag it to the bar. 
PIN Code Generator Random PINs, and the exact odds of guessing one. 
One-Time Pad Generator The one cipher proven unbreakable, on paper. 
Font Glyph Viewer Every glyph in the file, down to its control points. 
Slide Image Sizer Every image fills the slide, none of them stretched. 
Photo Card Maker Your photo, folded into a card that stands up. 
Printable Sign Maker Signs sized for the distance they are read from. 
Print Job Cost Estimator Your rates, your artwork, the real cost per piece. 
Keyboard Tester Every key, proven. Rollover, chatter, and all. 
Battery Pack Builder Series for volts, parallel for range. 
Lithophane Generator A photo you can only see when the light comes on. 
Compound Miter Calculator Set the saw once. Close the corner. 
3D Dice Roller Dice that tumble, land, and tell the truth. 
Four-Bar Linkage Simulator Four links, one motion, every position. 
OpenVPN Config Generator A real .ovpn file, directive by directive. 
Fret Position Calculator Every fret, to the hundredth, for any scale. 
Enigma Machine Simulator Type a letter. Watch the rotors decide. 
Normal Map Generator Flat photo in, surface detail out. 
Magnetic Declination Calculator How far your compass is from the truth, here and now. 
Gamepad Tester Every button, both sticks, and the drift you suspected. 
Gridfinity Bin Generator Bins that click into the grid, sized by you. 
Stair Calculator Equal steps, a stringer you can mark out. 
STL Viewer and Print Estimator Look before you slice. 
Zine and Booklet Maker Drop in pages. Print. Fold. Done. 
Shelf Sag Calculator Will it bow? Know before you cut. 
GPX Track Viewer Your route in 3D, with the climb laid bare. 
Wheel Offset Calculator See the poke and the tuck before you buy. 
LUFS Loudness Meter Know your loudness before the platform changes it. 
Bike Spoke Length Calculator Measure once, order the right spokes. 
Speaker Box Designer From driver numbers to a box you can build. 
Laser Cut Box Generator Six panels that press together first time. 
Involute Gear Generator True involute teeth, ready to cut or print. 
DTMF Decoder Hear the tones. Read the number. 
360 Panorama Viewer Step inside your photo. Or shrink it to a planet. 
Barbell Plate Loader Know the plates before you walk to the rack. 
Project Box Generator A printable case, sized to your board. 
Tire Size Comparison Two sizes, side by side, to scale. 
Room Mode Calculator See the bass your room adds on its own. 
Sun Path and Shadow Simulator Where the light lands, any day of the year. 
Truck Load Planner See it packed before you lift a box. 
Cut List Optimizer Fit every part on the fewest sheets. 
Color Blindness Palette Checker Wave Function Collapse Generator Guilloche Pattern Generator Reaction Diffusion Pattern Lab Moire Pattern Generator Paper Marbling Simulator Kumihimo Braid Designer Truchet Tile Pattern Maker Voronoi Stained Glass Maker Weaving Draft Designer Celtic Knot Generator Anamorphic Mirror Art Maker 
Hypothesis Test Visualizer Cam Profile Designer Fluid Flow Simulator Compound Interest Calculator Convex Hull Visualizer Catenary Curve Calculator Continued Fraction Explorer Newton Fractal Explorer Diffusion-Limited Aggregation Simulator Fourier Epicycle Drawing Machine Langton's Ant Simulator Hyperbolic Tiling Explorer 
Channel CAC Allocator Unit Economics Payback Calculator Revenue Retention Bridge Cohort Analysis Builder Purchase Price Allocation Calculator Black-Scholes Option Calculator Dollar-Cost Averaging Calculator Reference Rate Currency Converter Invoice Generator Story Point Estimator Print Job Cost Estimator Profit Margin Calculator 
Envelope Address Formatter Complaint Letter with Evidence Index Meeting Minutes from Your Transcript Memo Builder with Format Checks Press Release Builder and Fact Checker Cover Letter and Job Posting Checker Email Signature Builder and Checker Speaker Notes Card Maker Table Number Card Maker Printable Sign Maker Email HTML Previewer QR Code Business Card 
Social & Marketing
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