73 tools · 0 servers · runs in your browser
The fastest tools you'll never upload to.
Format JSON, generate passwords, convert colors, merge PDFs — all client-side. No accounts, no waiting, no data leaves your machine.
Most used
The tools people search for most.
Featured · Developer
JSON Formatter & Validator
Paste JSON to format, validate, or minify — runs entirely in your browser.
Featured · Security
Password Generator
Generate secure random passwords — cryptographically random, never leaves your browser.
Featured · Data
QR Code Generator
Create QR codes for URLs, text, or Wi-Fi. Download as PNG or SVG.
Featured · Finance
Invoice Generator
Build an invoice and download a clean PDF — no account, no upload.
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View all Developer
17 toolsJSON Formatter & Validator
Paste JSON to format, validate, or minify — runs entirely in your browser.
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Base64 Encoder / Decoder
Encode to Base64 or decode it back — handles UTF-8 correctly.
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JSON ↔ CSV Converter
Convert between JSON and CSV — round-trip safe, runs locally.
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Regex Tester
Build and test JavaScript regular expressions with live highlighting.
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UUID / GUID Generator
Generate cryptographically random UUID v4 identifiers.
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JSON ↔ YAML Converter
Switch between JSON and YAML — useful for Kubernetes, CI configs, and API specs.
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JWT Decoder
Paste a JWT to inspect its header and payload. Decoded locally.
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Markdown ↔ HTML Converter
Convert between Markdown and HTML with a live preview.
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UTM Link Builder
Add UTM parameters to a URL to track campaigns in Google Analytics and other tools.
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HTML Formatter & Minifier
Beautify or minify HTML — useful for emails, snippets, and copy-pasted markup.
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SQL Formatter
Make tangled SQL readable — supports common dialects.
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Cron Expression Generator
Build cron expressions and read them in plain English.
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URL Encoder / Decoder
Encode or decode URL components and query strings.
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.gitignore Generator
Pick your stacks to get a sensible .gitignore.
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XML Formatter & Validator
Pretty-print and validate XML.
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CSS Formatter & Minifier
Format CSS with consistent indentation or strip it down for production.
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JavaScript Formatter & Minifier
Format or minify JavaScript — handy for inspecting bundles or formatting snippets.
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View all Finance
13 toolsInvoice Generator
Build an invoice and download a clean PDF — no account, no upload.
¤Finance
Mortgage Calculator
See your monthly payment, total interest, and amortization at a glance.
¤Finance
Loan Amortization Calculator
See your loan payment, total interest, and an amortization schedule.
¤Finance
Percentage Calculator
Solve any percentage question in one place.
¤Finance
Compound Interest Calculator
See how an investment grows over time with compounding.
¤Finance
Profit Margin & Markup Calculator
Cost, price, margin, markup — fill in any two, get the rest.
¤Finance
ROI Calculator
Calculate ROI and annualized return for any investment.
¤Finance
Tip Calculator
Calculate the tip and split the bill.
¤Finance
Sales Tax Calculator
Add sales tax to an amount, or work out the tax already included in a total.
¤Finance
Break-Even Calculator
Find how many units you need to sell to cover costs.
¤Finance
Discount Calculator
See the final price after a discount, plus how much you save.
¤Finance
VAT / Sales Tax Calculator
Add or remove VAT / sales tax from any amount, at any rate.
¤Finance
Salary ↔ Hourly Converter
Convert salary to hourly rate or hourly rate to salary.
¤Finance
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View all Math & Units
4 toolsUnit Converter
Convert between metric and imperial units — length, weight, temperature, and more.
∑Math & Units
GPA Calculator
Enter your courses, letter grades, and credits to get your weighted GPA.
∑Math & Units
Fraction Calculator
Add, subtract, multiply, or divide two fractions — reduced result and decimal.
∑Math & Units
Roman Numeral Converter
Numbers to Roman numerals and back — supports 1 to 3999.
∑Math & Units
▢
View all Image
8 toolsImage Compressor
Compress JPEG, PNG, or WebP images without uploading.
▢Image
Image Resizer
Resize images to exact dimensions in your browser.
▢Image
Image Format Converter
Convert PNG, JPEG, and WebP — all in your browser.
▢Image
Image Cropper
Crop an image to any rectangle by dragging a selection.
▢Image
Image ↔ Base64
Convert images to data URIs (or back) — handy for inline assets.
▢Image
Color Picker from Image
Pick colors from an image by clicking — get HEX, RGB, and HSL.
▢Image
SVG Optimizer
Strip whitespace and comments from SVG files.
▢Image
EXIF Data Viewer
Inspect camera, lens, and GPS metadata embedded in your photos.
▢Image
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View all Text
10 toolsWord & Character Counter
Word, character, sentence, paragraph counts and reading-time estimate.
¶Text
Case Converter
Switch between UPPER, lower, Title, Sentence, camel, snake, and kebab case.
¶Text
Text Diff Tool
Compare two pieces of text and see what changed, line by line.
¶Text
Lorem Ipsum Generator
Generate placeholder text by paragraph, sentence, or word count.
¶Text
Fancy Text Generator
Convert text into 𝐛𝐨𝐥𝐝, 𝑖𝑡𝑎𝑙𝑖𝑐, 𝒔𝒄𝒓𝒊𝒑𝒕, ѕᴍᴀʟʟ ᴄᴀᴘѕ and many more styles.
¶Text
Line Tools (Sort, Dedupe, Reverse)
Sort, dedupe, or reverse lines — handy for cleaning up data.
¶Text
Slug Generator
Convert any phrase to a clean URL slug.
¶Text
Morse Code Translator
Convert text to Morse code and decode Morse back to plain text.
¶Text
Random Name Generator
Generate random full names, first names, last names, or made-up fantasy names.
¶Text
Text to ASCII Art
Turn text into ASCII banners in a variety of styles.
¶Text
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View all Design
6 toolsColor Converter (HEX, RGB, HSL)
Convert colors between HEX, RGB, and HSL with a live preview.
◐Design
CSS Gradient Generator
Build CSS linear and radial gradients with a live preview.
◐Design
Color Palette Generator
Generate complementary, analogous, and triadic palettes from any base color.
◐Design
WCAG Contrast Checker
Check whether text and background pass WCAG AA and AAA contrast ratios.
◐Design
CSS Box Shadow Generator
Design a box-shadow visually and grab the CSS.
◐Design
Favicon Generator
Upload an image to get favicons at standard sizes.
◐Design
⎘PDF
5 tools
View all PDF Merger
Combine multiple PDFs into a single document, in your browser.
⎘PDF
PDF Splitter
Extract specific pages or ranges from a PDF.
⎘PDF
JPG to PDF
Combine images into a single PDF — useful for receipts and scans.
⎘PDF
PDF to Image (JPG, PNG, WebP)
Render each page of a PDF as a JPG, PNG, or WebP image.
⎘PDF
PDF Page Rotator
Rotate any pages in a PDF and download the fixed file.
⎘PDF
✦
View all Security
3 toolsPassword Generator
Generate secure random passwords — cryptographically random, never leaves your browser.
✦Security
Hash Generator (MD5, SHA-1, SHA-256, SHA-512)
Hash any text with MD5, SHA-1, SHA-256, or SHA-512 — all in your browser.
✦Security
Password Strength Checker
See how long it would take to crack a password — never sent over the network.
✦Security
⌛
View all Date & Time
5 toolsAge Calculator
Find your exact age in years, months, and days — plus a countdown to your next birthday.
⌛Date & Time
Date Calculator
Add/subtract days from a date, or measure the gap between two dates.
⌛Date & Time
Time Zone Converter
See what a given time is in another time zone — and in UTC.
⌛Date & Time
Unix Timestamp Converter
Convert Unix timestamps to dates and back. Supports seconds and milliseconds.
⌛Date & Time
Countdown Timer
Count down from a set duration or to a target date — with a beep when time's up.
⌛Date & Time