Design
Image aspect ratio fitter
Fit an image into a new aspect ratio without cropping, using colored padding. Download a PNG.
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URL & subdomain sanitizer
Turn text into a URL-friendly slug, removing symbols and transliterating Turkish characters.
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Calculators
Net income for remote workers
Full-year 2026 estimate for a local employee with constant pay; excludes self-employment and cross-border tax treaties.
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Text
JSON formatter
Validate JSON and format it as readable, indented text. Your data stays in the browser.
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Design
APCA contrast tester
Measure perceptual contrast between text and background colors in APCA Lc. This is not a WCAG 2 pass/fail test.
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Design
SVG path compactor
Remove redundant whitespace from an SVG path string. Preserve the shape without rounding coordinates.
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Time
Cron schedule viewer
See the next five UTC runs of a five-field Cron expression. Searches within a one-year window.
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Text
Base64 text converter
Encode Unicode text to Base64 or decode Base64 back into text, entirely locally.
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Time
Custom Pomodoro cycle
Choose focus time, break time and repetitions to start your own focus timer.
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Design
CSS Grid generator
Turn column, row and gap values into a live grid preview and ready-to-use CSS.
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Text
Markdown table formatter
Convert tab-separated data into a Markdown table. The first row becomes the header.
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Calculators
Byte unit converter
Convert between bits, bytes and decimal or binary file-size units.
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Calculators
Password entropy estimate
Estimate theoretical entropy from the character pool. Assumes random selection; does not measure real password security.
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Text
Regex match inspector
Test a regular expression against text and inspect matches and positions. Long-running expressions are stopped.
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Time
Unix timestamp converter
Convert Unix seconds or milliseconds to a UTC date, or a date string to a timestamp.
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Design
HEX to RGBA mixer
Convert a HEX color and opacity percentage to CSS RGBA and preview the color.
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Text
URL query parser
Decode and list URL query parameters while preserving repeated keys.
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Text
HTML entity encoder
Convert special HTML characters to entities. The output is displayed as plain text.
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Text
Text diff checker
Compare two texts line by line, highlighting additions and deletions.
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Calculators
Paint procurement report for contractors
Turn net measurements into whole-can orders; see waste, leftover paint and material cost.
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Calculators
SaaS seat cost analysis for agencies
Compare purchased and active seats; find the monthly and annual cost of idle licenses.
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Time
Delivery capacity planner for translators
Schedule word counts at your translation speed; include revision time and identify capacity gaps.
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Calculators
DMX patch planner
Allocate mixed lighting fixtures across universes without overlapping addresses.
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Design
Print sheet yield planner
Compare print layouts with bleed, margins and grain-direction rotation limits.
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Time
Time-lapse capture planner
Plan photo count, shooting duration and storage from a target clip.
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Calculators
IPv4 subnet split planner
Split a parent network into equal subnets with usable ranges and paged CSV output.
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Calculators
Preferment dough batch planner
Scale a bakery batch while separating preferment flour and water from the final mix.
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Calculators
Speaker arrival alignment
Calculate additional delay for two speaker paths at one listening position.
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Calculators
Seed-lot sowing planner
Convert a target stand and measured seed-lot quality into kg/ha and total seed mass.
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Calculators
Bolt circle coordinate planner
Generate numbered X/Y centers for evenly spaced holes, with a diagram and CSV.
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Calculators
Roll stock length estimator
Estimate usable roll length, area and the shortage for a print job without unwinding.
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Design
Knife pleat marking planner
Fit existing fabric to a finished width and obtain every fold and matching mark.
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Calculators
Clay test shrinkage planner
Turn a measured test bar into the wet forming size for a finished ceramic piece.
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Calculators
Catch-can irrigation audit
Calculate lower-quarter uniformity, application rate and time to a target average depth.
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Calculators
Bellows exposure compensation
Calculate exposure time from bellows extension and additional filter stops.
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Design
Folio signature planner
Split a book into hand-binding signatures with page ranges and blank-page counts.
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Calculators
Mixed lumber volume tally
Total mixed rectangular lumber batches in board feet and cubic metres.
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Design
Circle skirt drafting planner
Calculate seam-line radii and equal panel angles for a circle skirt, with a drawing and measurement table.
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Calculators
CNC milling feed planner
Convert tool diameter, cutting speed, tooth count and chip load into spindle RPM and table feed.
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Calculators
Sheet-metal bend flat planner
Calculate bend allowance, setback, deduction and flat length from shop dimensions.
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Calculators
Weld heat-input planner
Turn voltage, current, travel speed and process efficiency into arc and effective heat input.
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Calculators
HVAC superheat and subcooling worksheet
Calculate both temperature differences from four measured line and saturation temperatures.
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Calculators
Roller-chain length planner
Estimate chain pitches, choose a link count and recalculate the resulting centre distance.
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Calculators
Generation III Pokémon IV range checker
Find compatible IV values from one displayed Gen III stat and a known EV range, fully offline.
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Calculators
Bakery water-temperature planner
Plan mixing-water temperature for a baker’s target dough temperature, with or without preferment.
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Calculators
Sample-rate reinterpretation planner
Preview duration and pitch changes before an audio editor reinterprets a sample-rate header.
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Calculators
Booklet creep worksheet
Give prepress operators per-sheet page shifts for a folded booklet signature.
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Calculators
Repeat-matched upholstery cutting planner
Plan identical upholstery panels with aligned straight-repeat patterns.
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Calculators
Window opening measurement worksheet
Turn three-point opening measurements into an installer’s nominal frame worksheet.
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Calculators
Hydroponic EC calibration worksheet
Interpolate a grower’s measured dry-recipe concentration and scale a new batch.
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Design
AI image watermark remover
Find, remove and recheck supported invisible pixel watermarks on your device. Images stay in your browser.
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