Free · client-side · no account

Tools that run
in the tab.
Not the cloud.

Formatters, converters, generators and calculators. No sign-up, no uploads, nothing leaves your device.

Browse all 33 tools or pressCtrlK

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Developer tools

Free developer tools that run in your browser: JSON formatter, Base64 and URL encoders, JWT decoder, hash and UUID generators, and a regex tester.

13 tools

JSON FormatterFree JSON formatter and validator: beautify, minify and fix errors fast.

Unix Timestamp ConverterUnix timestamp converter: epoch seconds or milliseconds to date and back, live.

Base64 Encoder / DecoderBase64 encode or decode text online with UTF-8 and URL-safe support.

URL Encoder / DecoderURL encoder and decoder for query strings, paths and full URLs, in one click.

JWT DecoderJWT decoder: view header, payload and claims and check expiry in your browser.

UUID GeneratorUUID generator for random v4 UUIDs and GUIDs, one at a time or 1000 in bulk.

Hash GeneratorHash generator for MD5, SHA-1, SHA-256, SHA-384 and SHA-512 digests of text.

Regex TesterRegex tester with live highlighting, capture groups and flags for JavaScript.

Cron Expression GeneratorCron expression generator with plain English preview and next run times.

Chmod CalculatorChmod calculator: tick permissions to get octal, symbolic and the chmod command.

CSV to JSON ConverterCSV to JSON converter with delimiter detection, typed values and JSON to CSV.

Markdown EditorOnline Markdown editor with live preview, formatting toolbar and HTML export.

HTML Entity Encoder / DecoderFree HTML entity encoder and decoder for special and accented characters.

Text tools

Free text tools for writers and coders: count words and characters, convert text case, and generate strong passwords, all processed in your browser.

6 tools

Word CounterWord counter with characters, sentences, paragraphs, reading time and keywords.

Text Diff CheckerText diff checker: compare two texts by line, word or character in your browser.

Case ConverterCase converter: upper, lower, title, sentence, camel, snake, kebab and more.

Password GeneratorStrong password generator and passphrase generator that runs in your browser.

Lorem Ipsum GeneratorLorem ipsum generator: paragraphs, sentences or words as text, HTML or Markdown.

Slug GeneratorFree slug generator: turn any title into a clean, SEO friendly URL slug.

Finance calculators

Free finance calculators: loan payments and amortization, compound interest growth, and everyday percentage maths for tax, tips and discounts.

9 tools

Loan CalculatorLoan calculator for monthly payment, total interest and amortization schedule.

Compound Interest CalculatorCompound interest calculator with monthly contributions and a yearly table.

Percentage CalculatorPercentage calculator for percent of, percent change, tax, tips and discounts.

Mortgage CalculatorMortgage calculator with taxes, insurance, HOA, PMI and extra payments.

EMI CalculatorEMI calculator for home, car and personal loans with a monthly schedule.

Credit Card Payoff CalculatorCredit card payoff calculator: months to debt free, interest and payment needed.

Salary to Hourly CalculatorSalary to hourly calculator: convert yearly, monthly and hourly pay both ways.

Tip CalculatorTip calculator with bill splitting, quick percentages and rounding up the total.

Discount CalculatorDiscount calculator for percent off, stacked deals, buy X get Y and sales tax.

Converters

Free online converters for units and colors: length, weight, temperature, volume and data units, plus HEX, RGB and HSL codes with a WCAG contrast check.

2 tools

Color ConverterColor converter for HEX, RGB, HSL and CSS syntax with a WCAG contrast checker.

Unit ConverterUnit converter for length, weight, temperature, area, volume, speed and data.

Image tools

Free image tools that run in your browser: compress JPG and PNG, resize images to exact pixels, and generate QR codes. No upload, no watermark.

3 tools

Image CompressorCompress images in your browser: shrink JPG, PNG and WebP with no upload.

Image ResizerResize images by pixels, percent or preset in your browser. No upload.

QR Code GeneratorFree QR code generator for URLs, Wi-Fi, contacts and email. PNG and SVG export.