Free · No login · Runs in your browser

Pick the small task. Open the right tool.

85 small, single-purpose utilities — format JSON, calculate a subnet, generate a UUID, check a password. Nothing to install, no account to create: open a page, do the work, leave with the result.

Showing 85 of 85 tools

Android

1 tool

APK SnapshotInspect APK package, signing, and contents.

Code

1 tool

EditorConfigBuild a .editorconfig for indent, charset, and EOL.

Data

6 tools

SQL FormatterFormat and pretty-print SQL with keyword casing.
TOML ↔ JSONConvert between TOML and JSON in either direction.
JSONPathRun a JSONPath expression and inspect the matches.
Base32Encode and decode Base32 strings (RFC 4648).
Base58Encode and decode Base58 (Bitcoin alphabet).
Hex ↔ ASCIIConvert between hex bytes and printable ASCII.

Design

10 tools

SVG CreatorBuild simple original SVG snippets.
QR Code GeneratorRender a downloadable QR code from text or URL.
CSS ShadowVisual CSS box-shadow editor with live preview.
GradientBuild CSS linear and radial gradients.
FaviconDraw a favicon and download in 16, 32, 48, 180.
CSS AnimationBuild CSS keyframe animations with live preview.
Color Contrast CheckerWCAG contrast ratio with live readable-text preview.
Color ConverterConvert HEX, RGB, HSL, and OKLCH with no rounding loss.
Typography ScaleBuild a modular type scale in px, rem, em, and pt.
Spacing ScaleBuild a spacing scale in px, rem, em, and tailwind units.

Dev

25 tools

Case ConverterSwitch between camelCase, snake_case, kebab-case, and more.
URL EncoderencodeURI, encodeURIComponent, and decode.
Base64Standard and URL-safe Base64, with hex mode.
UUIDGenerate v1, v4, v7, and nil UUIDs in bulk.
JSON FormatterFormat, minify, and sort-key JSON with line errors.
YAML / JSONConvert YAML to JSON and back in the browser.
.gitignore GeneratorBuild a .gitignore from curated stack templates.
Dockerfile LinterLint a Dockerfile against best practices.
SemverParse, compare, and bump semver versions.
HTTP StatusLook up HTTP status codes and reason phrases.
Unit ConverterLength, mass, temperature, area, volume, time, data.
CalculatorBasic and scientific calculator with history.
StatsMean, median, mode, variance, stdev, quartiles.
TypeScript from JSONGenerate TypeScript interfaces from JSON objects.
Barcode GeneratorGenerate Code128, EAN-13, UPC-A, and QR barcodes.
CSV <> JSONConvert between CSV and JSON in the browser.
Hash GeneratorCompute MD5, SHA-1, SHA-256, and SHA-512 of input text.
Text DiffCompare two text blocks with line-level highlighting.
Cron ParserExplain a 5-field cron expression and the next five fires.
JWT InspectorDecode a JWT, verify the HMAC signature, and check claims.
Morse CodeEncode and decode International Morse code.
Chmod CalculatorConvert between 9-bit mode, octal, symbolic, and decimal.
Luhn CheckValidate Luhn check digits and generate valid suffixes.
Radix ConverterConvert between decimal, binary, octal, and hex with BigInt.
Subnet CalculatorBreak down an IPv4 CIDR into network, broadcast, and hosts.

Docs

5 tools

Doc SnippetConvert short snippets into Markdown and Mermaid.
License PackGenerate MIT, Apache, BSD, GPL, ISC, MPL, Unlicense.
Markdown PreviewType Markdown on the left, see rendered HTML on the right.
LaTeX PreviewRender LaTeX formulas inline as you type.
PDF to MarkdownExtract text from PDF files as formatted Markdown.

Finance

1 tool

Loan CalculatorPlan a fixed-rate loan with monthly payment and schedule.

Images

2 tools

Image ResizerResize, crop, and convert images in the browser.
Image MetadataWrite SEO title, alt text, and keywords into images.

Marketing

1 tool

UTM BuilderBuild clean campaign URLs with UTM parameters.

Math

5 tools

PercentPercent of, change, what percent, percent off.
Tip CalculatorTip, tax, and split a bill among N people.
Compound InterestProject a balance with monthly contributions and rate.
MortgageEstimate a monthly payment and total interest.
PaceConvert running pace, speed, and finish time.

Productivity

5 tools

EisenhowerPrioritize tasks by urgency and importance.
Habit TrackerDaily check-ins, current streak, longest streak.
Pomodoro Timer25/5/15 work, short break, long break cycle in the browser.
Decision HelperMulti-criteria weighted scoring with a confidence reading.
KanbanA 4-column Kanban board kept in local storage.

Random

3 tools

Random PickerPick a winner from a list with optional weights.
Coin FlipFlip a virtual coin with a fair random result.
Username GeneratorGenerate readable usernames with words and digits.

Security

2 tools

Text EncryptorEncrypt and decrypt small text snippets locally.
Password GeneratorGenerate strong passwords and passphrases locally.

Text

4 tools

Sort LinesSort, dedupe, and shuffle lines of text.
Word FrequencyCount words, find repeats, and rank by usage.
Tab ↔ SpaceConvert leading tabs to spaces or leading spaces to tabs.
Caesar CipherShift letters and decode classic Caesar ciphers.

Time

6 tools

Timestamp ConverterConvert Unix, ISO, RFC 2822, and relative time stamps.
AgeAge in years, months, days, weeks, hours, minutes, seconds.
Date DiffDifference and arithmetic on two dates.
World ClockSee the current time in several cities at a glance.
StopwatchStart, stop, lap, and reset a clean stopwatch.
ISO WeekGet the ISO week number and year for any date.

Web

2 tools

robots.txtGenerate a robots.txt with custom allow and disallow rules.
security.txtDraft a security.txt at /.well-known/security.txt.

Writing

6 tools

Originality CheckerWriting-quality and similarity signals.
HTML EntityEncode and decode HTML entities in the browser.
Lorem IpsumGenerate lorem ipsum filler in four flavors.
Read TimeWord count, character count, and reading time.
Word CounterCount words, characters, sentences, and reading time.
Slug GeneratorConvert text to URL-friendly slugs.