Free online tools, no clutter.
A clean matrix of small utilities for developers, writers, and everyday tasks. Fast, private, no sign-up.
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Popular tools
JSON Formatter
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DeveloperB64Base64
Encode and decode Base64 with UTF-8 safety.
Developer%20URL Encode
Encode and decode URLs and query strings.
Finance$Take-Home Pay Calculator
Estimate US take-home pay by state and filing status.
DeveloperTEpoch Converter
Convert Unix timestamps to dates and back.
Pro Dev Suite
All-in-one toolkit for teams. Try free for 14 days.
Lorem Ipsum
Generate placeholder Lorem Ipsum paragraphs.
CalculatorLOANLoan Calculator
Estimate monthly loan payments and total interest.
DeveloperJSONJSON Validator
Check JSON for errors and see the reason.
DeveloperHASHHash Generator
Hash text with SHA-1/256/384/512 locally.
DeveloperJWTJWT Decoder
Decode a JWT header and payload.
Cloud Storage+
Back up files with end-to-end encryption.
Diff Checker
Compare two texts line by line.
DeveloperENTHTML Entities
Encode and decode HTML entities.
CalculatorGPAGPA Calculator
Weight your course grades into a GPA.
CalculatorkcalBMR Calculator
Basal metabolic rate (Mifflin-St Jeor).
CalculatorTDEECalorie Calculator
TDEE from BMR and activity level.
DeveloperNETSubnet Calculator
Network, broadcast and usable hosts from IP and prefix.
DeveloperJYJSON to YAML Converter
Turn JSON into readable YAML.
DeveloperYJYAML to JSON Converter
Parse a YAML subset into JSON.
DeveloperCJCSV to JSON Converter
Convert CSV rows into JSON.
DeveloperJCJSON to CSV Converter
Flatten a JSON array into CSV.
DeveloperSQLSQL Formatter
Pretty-print a SQL statement.
DeveloperHMHTML to Markdown Converter
Convert common HTML into Markdown.
DeveloperMHMarkdown to HTML Converter
Render Markdown into HTML.
DeveloperSLGSlug Generator
Make a URL-friendly slug from text.
DeveloperURLURL Parser
Break a URL into its parts.
DeveloperUAUser Agent Parser
Identify browser, OS and device from a UA.
DeveloperJWTJWT Encoder
Build a JWT from a header and payload.
DeveloperMINHTML Minifier
Strip comments and extra whitespace from HTML.
DeveloperJXJSON to XML Converter
Serialize JSON into XML.
CalculatorPRGProgrammer Calculator
A free programmer calculator: switch between binary, octal, decimal and hex, and apply bitwise AND, OR, XOR, shifts and rotations.
CalculatorNWNet Worth Calculator
Assets minus what you owe.
CalculatorSUBSubscription Cost Calculator
Yearly and weekly cost.
CalculatorLSLease Calculator
Total cost of a lease.
CalculatorAPRAPR Calculator
Effective rate from nominal.
CalculatorGRDFinal Grade Calculator
Score needed on final.
CalculatorMEDMedian Calculator
Middle value of a list.
CalculatorRNGRange Calculator
Spread from max to min.
CalculatorVARVariance Calculator
Spread around the mean.
CalculatorMODMode Calculator
Most frequent value.
CalculatorPCTPercentile Calculator
P-th percentile of a set.
CalculatorSPLBill Split Calculator
Even share per person.
CalculatorTAXTax Calculator
Tax and total from amount.
CalculatorPNTPaint Calculator
Paint needed for a wall.
CalculatorFLRFlooring Calculator
Boxes for a floor.
CalculatorFNCFencing Calculator
Posts and rail length.
CalculatorSTRStair Calculator
Steps and total run.
CalculatorRMPRamp Calculator
Angle and slope.
CalculatorCALCalorie Deficit Calculator
Daily kcal to lose.
CalculatorMACMacro Split Calculator
Protein, fat, carbs.
CalculatorVO2VO2 Max Calculator
Estimated aerobic fitness.
CalculatorCALCScientific Calculator
A full keypad for arithmetic, roots and powers.