Quialo
Small, fast, genuinely useful utility tools that run right in your browser. No signup, no friction, and your data stays on your device.
Popular tools
The tools people reach for most, all free and running in your browser.
- Hash GeneratorGenerate SHA-1, SHA-256, SHA-384, and SHA-512 hashes of any text in your browser. Fast, private, and copy ready.
- UUID GeneratorGenerate random version 4 UUIDs in your browser. Pick how many (1 to 100) and copy them in one click. Fast, private, no signup.
- Case ConverterConvert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, and kebab-case instantly in your browser.
- Calorie CalculatorEstimate daily maintenance calories (TDEE). Compute BMR with Mifflin St Jeor then multiply by activity level. Choose from five activity factors. Private.
- Compound Interest CalculatorCalculate compound interest fast. Enter principal, annual rate, years, and compounding frequency to see the total amount and interest earned.
Recently added
The latest tools to land on Quialo.
- YAML to JSON ConverterConvert YAML to JSON and JSON to YAML in your browser. Auto detects the format, with formatted output, type aware parsing, and clear errors.
- CSV to JSON ConverterConvert CSV to JSON and JSON to CSV in your browser. Configurable delimiter and quote, optional header row, and type inference. Nothing uploaded.
- Loan CalculatorCalculate your monthly loan payment, total interest, and a full amortization schedule. Add extra payments to see the interest and time you save.
Calculators
Everyday calculators for health, dates, math, and quick numbers, all in your browser.
- Age CalculatorCalculate exact age in years, months, and days between a birth date and any reference date. Handles leap years correctly. Free and private.
- Average CalculatorCalculate mean, median, mode, min, max, range, and sum for a list of numbers. Paste values and get instant stats. Free and private in your browser.
- BMI CalculatorCalculate body mass index from weight and height in metric or imperial units. See the category and healthy ranges instantly. Private and free.
- BMR CalculatorEstimate basal metabolic rate using the Mifflin St Jeor equation. Enter sex, weight, height, and age for daily calories at complete rest. Private.
- Body Fat CalculatorEstimate body fat percentage with the US Navy circumference method. Enter height, neck, waist, and hip (for women) in centimetres. Fast and private.
- Calorie CalculatorEstimate daily maintenance calories (TDEE). Compute BMR with Mifflin St Jeor then multiply by activity level. Choose from five activity factors. Private.
- Date Difference CalculatorCalculate the exact difference between two dates in total days, weeks, and a calendar breakdown of years, months, and days. Handles order automatically.
- Ideal Weight CalculatorEstimate ideal body weight with both the Devine and Robinson formulas. Switch between centimetres and inches. Results in kilograms, client side only.
- Time Duration CalculatorCalculate hours and minutes between two HH:MM times. Automatically handles spans that cross midnight. Simple, accurate, and private.
- Standard Deviation CalculatorCalculate mean, variance, and standard deviation for a data set. Get both population and sample results from comma, space, or newline separated numbers.
- GPA CalculatorCalculate your weighted GPA from each course grade points and credit hours. Free, fast, and private. Works on the 0 to 4.0 scale.
- Pace CalculatorCalculate running pace per km and per mile plus average speed from a distance and total time. Free, fast, and works in your browser.
- Fraction CalculatorAdd, subtract, multiply, or divide two fractions. Get a simplified fraction reduced by GCD plus the decimal value, with division by zero guarded.
- Ratio CalculatorSimplify a ratio to its lowest terms with the GCD, or solve a proportion a:b = c:x for the missing value. Free and instant.
- Random Number GeneratorGenerate random integers between any min and max. Pick how many you need and choose unique values with no repeats. Free and runs in your browser.
- Percentage Change CalculatorFind the percentage change between two numbers. See the increase or decrease and the exact difference instantly, with a guard for an old value of zero.
Finance
Simple calculators for loans, savings, and everyday money questions.
- EMI CalculatorCalculate your monthly loan EMI, total interest, and total payment. Enter loan amount, interest rate, and tenure to see results instantly. Free.
- SIP CalculatorCalculate the future value of a monthly SIP. See invested amount, estimated returns, and total value for any return rate and tenure.
- Compound Interest CalculatorCalculate compound interest fast. Enter principal, annual rate, years, and compounding frequency to see the total amount and interest earned.
- Simple Interest CalculatorCalculate simple interest and the total amount from a principal, annual rate, and time in years. Fast, free, and works in your browser.
- Percentage CalculatorFree percentage calculator. Find a percent of a number, what percent one number is of another, and the percentage increase or decrease.
- Discount CalculatorWork out the sale price and how much you save from a discount percent, or find the discount percent from an original and final price.
- Tip CalculatorWork out the tip, the total with tip, and each person's share. Split the bill across any party size, currency free.
- FD CalculatorCalculate fixed deposit maturity and interest earned with compound interest. Set principal, rate, tenure, and compounding frequency.
- ROI CalculatorCalculate return on investment from your initial cost and final value. See net gain, ROI percent, and annualized return.
- Inflation CalculatorSee how inflation raises the future cost of goods and erodes the buying power of money over time. Enter an amount, a rate, and years.
- Savings Goal CalculatorFind the monthly contribution needed to reach a savings target by a set date, given an expected annual return rate.
- GST and VAT CalculatorAdd or remove GST or VAT from any amount. Get the base, the tax, and the total instantly at any rate.
- Markup CalculatorCalculate selling price, profit, and profit margin from a cost and a markup percent. Fast, free, and works in your browser.
- Break Even CalculatorFind your break-even point fast. Enter fixed costs, selling price, and variable cost per unit to get break-even units and revenue.
- Loan CalculatorCalculate your monthly loan payment, total interest, and a full amortization schedule. Add extra payments to see the interest and time you save.
Developer
Fast developer utilities that run in your browser: formatters, validators, and converters.
- JSON FormatterFormat, validate, and beautify JSON in your browser. Paste messy JSON, get clean indented output, then copy it back. Free, no signup.
- Base64 EncoderEncode text to Base64 or decode Base64 back to text in your browser. Full UTF-8 support and clear errors on invalid input.
- URL EncoderPercent encode and decode text for URLs in your browser. Toggle direction, copy results, and see clear errors on malformed input.
- HTML Entity EncoderEncode special characters to HTML entities or decode them back. Handles ampersand, less than, greater than, and quotes with a direction toggle.
- UUID GeneratorGenerate random version 4 UUIDs in your browser. Pick how many (1 to 100) and copy them in one click. Fast, private, no signup.
- Color ConverterPaste any color in hex, rgb, hsl, hwb, oklch, or a CSS name and get every other format at once, each with its own copy button.
- JSON to CSV ConverterConvert a JSON array of flat objects into clean CSV in your browser. Header row from all keys, with safe quoting for commas, quotes, and line breaks.
- Unix Timestamp ConverterConvert a Unix timestamp to a readable UTC date and back. Handles seconds and milliseconds, validates input, and runs fully in your browser.
- JWT DecoderDecode a JWT in your browser. See the header, payload, and signature, with the standard claims flagged and an expired indicator. Nothing leaves your device.
- Hash GeneratorGenerate SHA-1, SHA-256, SHA-384, and SHA-512 hashes of any text in your browser. Fast, private, and copy ready.
- CSV to JSON ConverterConvert CSV text to a JSON array of objects in your browser. Uses the first row as keys and handles quoted fields, commas, and line breaks.
- Number Base ConverterConvert integers between binary, octal, decimal, and hexadecimal. Pick a source base, enter a value, see the other three. Handles large numbers.
- Regex TesterTest a regular expression against sample text in your browser. See every match, its index, capture groups, and the total count.
- Query String ParserParse a URL query string into key and value pairs, or build one from pairs. Handles a leading question mark, repeated keys, and encoded values.
- Color Contrast CheckerCheck the WCAG contrast ratio between two hex colors and see if they pass AA and AAA for normal and large text.
- Password GeneratorGenerate a strong random password in your browser. Choose the length and mix of lowercase, uppercase, digits, and symbols. Nothing is stored.
- SQL FormatterFormat and indent SQL queries online. Put SELECT, FROM, WHERE, and JOIN on their own lines, set keyword case, and copy clean results.
- XML FormatterPretty print XML with clean indentation per nesting level. Pick 2 spaces, 4 spaces, or tabs. Validates broken markup, runs in your browser.
- CSS MinifierMinify CSS online. Strip comments and whitespace, collapse spaces, and shrink stylesheets while keeping strings and url() values intact.
- HTML MinifierMinify HTML in your browser. Remove comments and collapse whitespace while keeping pre, textarea, script, and style content intact.
- Cron Expression Builder and ExplainerBuild a cron expression with dropdowns, or paste one to get a plain English explanation and the next 5 run times. Supports 5 and 6 field cron.
- Diff CheckerCompare two blocks of text and see what changed, line by line or word by word. Side by side, inline, or unified diff views. Free and private in your browser.
- String EscaperEscape and unescape strings for JSON and JavaScript. Convert newlines, tabs, quotes, and backslashes to and from their escaped forms in your browser.
- ASCII ConverterConvert text to ASCII or Unicode code points and back. Encode characters to decimal numbers or decode numbers to text in your browser.
- Box Shadow GeneratorDesign CSS box shadows with live preview. Adjust offset, blur, spread, color, and opacity, stack multiple layers, then copy the rule.
- CSS Gradient GeneratorBuild linear, radial, and conic CSS gradients with a live preview. Adjust angle, stops, and colors, then copy the background rule.
- QR Code GeneratorCreate a QR code for a URL, text, WiFi, vCard, email, or phone number. Pick the error correction level, then download a PNG or SVG. Free and private.
- AI Token CounterEstimate how many tokens your text uses for GPT, Claude, Llama, and Gemini, with character and word counts and an approximate cost per model.
- CSV to JSON ConverterConvert CSV to JSON and JSON to CSV in your browser. Configurable delimiter and quote, optional header row, and type inference. Nothing uploaded.
- YAML to JSON ConverterConvert YAML to JSON and JSON to YAML in your browser. Auto detects the format, with formatted output, type aware parsing, and clear errors.
Text
Handy text utilities for cleaning, converting, and transforming text fast.
- Word CounterCount words, characters, sentences, paragraphs, and reading time for any text. Live, private, and free in your browser.
- Case ConverterConvert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, and kebab-case instantly in your browser.
- Remove Line BreaksRemove line breaks from text online. Replace them with a single space or nothing, collapse extra spaces, and trim. Free and private.
- Lorem Ipsum GeneratorGenerate lorem ipsum placeholder text by paragraphs, sentences, or words. Copy it instantly for mockups, layouts, and design drafts.
- Slug GeneratorTurn any title or text into a clean, lowercase URL slug. Spaces become hyphens, punctuation is stripped, and repeats are collapsed.
- Remove Duplicate LinesRemove duplicate lines from text online. Optional case insensitive matching and whitespace trimming, with a count of removed lines.
- Sort LinesSort lines of text online. Alphabetical (A to Z, Z to A), case insensitive, numeric, by length, or reverse. Fast, private, and free.
- Find and ReplaceFind and replace text online. Case insensitive, whole word, and regex modes with a live replacement count. Runs in your browser.
- Text ReverserReverse text by characters, by word order, or by line order. Emoji safe and fully client-side. Paste, pick a mode, and copy the result.
- Whitespace RemoverClean up whitespace in text. Trim lines, collapse extra spaces, remove blank lines, or strip all spaces. Free, fast, and private in your browser.
- Text to Binary ConverterConvert text to binary and binary back to text. UTF-8 safe, 8 bits per byte, space separated. Free and runs in your browser.
- Repeat TextRepeat any text a chosen number of times with an optional separator. See the total length and copy the result instantly.
Engineering
Unit converters and technical calculators for length, mass, energy, data, numbers, and other quantities used in design, construction, and science.
- Length ConverterConvert length between meters, kilometers, centimeters, millimeters, miles, yards, feet, and inches instantly in your browser.
- Weight ConverterConvert weight and mass units instantly. Switch between kilograms, grams, milligrams, tonnes, pounds, ounces, and stone.
- Temperature ConverterConvert temperatures between Celsius, Fahrenheit, and Kelvin instantly. Free, accurate, and works offline in your browser.
- Volume ConverterConvert volume between liters, milliliters, cubic meters, US gallons, quarts, pints, cups, and fluid ounces instantly.
- Area ConverterConvert area between square meters, square feet, acres, hectares, square miles, and more. Fast, accurate, and free.
- Speed ConverterConvert speed between m/s, km/h, mph, knots, and feet per second. Pick from and to units, swap them, and copy the exact result.
- Data Storage ConverterConvert between bits, bytes, KB, MB, GB, TB, and PB using the binary standard where 1 KB equals 1024 bytes.
- Time Unit ConverterConvert time units instantly: milliseconds, seconds, minutes, hours, days, weeks, and years (365 days). Free, accurate, works in your browser.
- Pressure ConverterConvert pressure between pascal, kilopascal, bar, psi, and atmosphere. Fast, free, and accurate, with a swap control and live results.
- Energy ConverterConvert energy units online: joule, kilojoule, calorie, kilocalorie, watt hour, and kilowatt hour. Fast, accurate, and free.
- Power ConverterConvert power units instantly: watts, kilowatts, megawatts, and mechanical horsepower. Free, accurate, and works right in your browser.
- Angle ConverterConvert angles between degrees, radians, gradians, and turns. Fast, accurate, and free, with a swap control and copy to clipboard.
- Frequency ConverterConvert frequency between hertz, kilohertz, megahertz, and gigahertz. Fast, accurate, and free, with a swap control and copy button.
- Fuel Economy ConverterConvert fuel economy between miles per gallon (US), kilometers per liter, and liters per 100 km. Live results, swap, and copy.
- Roman Numeral ConverterConvert numbers to Roman numerals and Roman numerals back to numbers. Covers 1 to 3999, validates the range, and rejects malformed numerals.
- Number to Words ConverterConvert any whole number into English words instantly. Supports values up to the trillions, plus zero and negatives. Free and runs in your browser.
SEO
Practical SEO utilities for checking, generating, and cleaning up the details that matter.
- Meta Tag GeneratorGenerate clean HTML meta tags: title, description, canonical, and robots. Get a ready to paste block with length warnings built in.
- Meta Tag and OG Preview GeneratorGenerate title, description, Open Graph, and Twitter tags, then preview how your page looks in Google, Facebook, X, and LinkedIn.
- Keyword Density CheckerPaste text and see the most frequent words plus their density percentage. Ignore stop words and pick how many top words to show.
- UTM BuilderBuild a campaign tracking URL with utm_source, utm_medium, utm_campaign, and optional term and content. Values are encoded for you.
- SERP Snippet PreviewPreview how your page title and meta description may appear in search results, with live character counts and length warnings.
- Robots.txt GeneratorBuild a valid robots.txt file from simple inputs. Set user-agent rules with allow and disallow paths, add a sitemap, then copy the result.
- Open Graph GeneratorGenerate Open Graph and Twitter Card meta tags from a title, description, URL, image, and type. Copy a ready to paste block in seconds.
- Schema Markup GeneratorGenerate valid JSON-LD structured data for Article, FAQ, and Organization. Fill in the fields and copy a ready to paste script tag.
- Hreflang Tag GeneratorGenerate hreflang link tags for international pages. Pair language or region codes with URLs, add an x-default, and copy the ready block.
Quick PDF helpers that work right in your browser, with your files staying on your device.
- Merge PDFsMerge multiple PDFs into one document in your browser. Reorder files, preview pages, and download. Files stay private on your device. Free, no signup.
- Split PDFSplit a PDF by extracting a page range into a new file. Free, fast, and fully private because everything runs in your browser.
- Rotate PDFRotate every page of a PDF by 90, 180, or 270 degrees in your browser. Free, private, no upload required.
- Delete PDF PagesRemove pages from a PDF in your browser. Pick a file, list the pages to delete, and download the new PDF. Private and fast.
- Extract PDF PagesKeep only the pages you want from a PDF. Pick single pages and ranges, then download a new PDF. Free, fast, and private in your browser.
- Reorder PDF PagesRearrange the pages of a PDF into any order you choose. Free, private, and runs entirely in your browser. No upload, no signup.
- Images to PDFCombine JPG and PNG images into a single PDF in your browser. One image per page, sized to the image, private and free.
- Add Page Numbers to PDFAdd page numbers to any PDF in your browser. Numbers are drawn at the bottom center of every page. Private, free, and no upload required.
- PDF Metadata ViewerView PDF metadata in your browser: title, author, subject, creator, producer, page count, and file size. Private and fast, no upload needed.
Image
Resize, compress, convert, and inspect images right in your browser, with files staying on your device.
- Image ResizerResize images in your browser. Lock aspect ratio, choose PNG, JPEG or WebP output with quality control, and download. Private, fast, no signup.
- Image CropperCrop images in your browser. Drag to select a region, snap to preset aspect ratios like 1:1 and 16:9, then download PNG or JPEG. Private, no signup.
- Image Format ConverterConvert images between PNG, JPEG, WebP, and AVIF in your browser. Drop a file, pick a target format, and download. Private, with no upload.
- Image CompressorCompress JPG, PNG, or WebP images in your browser. Adjust quality, see the before and after size, and download the smaller file. Private, no upload.