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The full catalog of instruments: math, converters, developer utilities, design helpers and text tools. Search by name, by task or by alias, in English, Russian or Armenian.
201 showing
01 Scientific Calculator Expressions, functions and a running history.math02 Percentage Calculator Percent of a value, change, discount and reverse.math03 Fraction Calculator Add, subtract, multiply and divide fractions.math04 Ratio Calculator Simplify a:b and solve a proportion.math05 Average Calculator Mean, median and mode from a list.math06 Statistics Calculator Count, range, variance and standard deviation.math07 Equation Solver Linear equations in x.math08 Quadratic Equation Solver Roots, discriminant and the nature of the solution.math09 GCD & LCM Greatest common divisor and least common multiple.math10 Prime Number Checker Deterministic test up to 64-bit integers.math11 Number Base Converter Convert between bases 2 through 36.math12 Scientific Notation Move between decimal and coefficient × 10^n.math13 Random Number Generator Cryptographic random integers and decimals.math14 Unit Converter Length, mass, temperature, data and more.math15 Date Calculator Difference between dates and shifting by an interval.math16 PNG to JPG Flatten a PNG onto white and download a JPEG.converter17 JPG to PNG Re-encode a JPEG as a PNG.converter18 Image to WebP Encode PNG, JPEG or WebP as WebP.converter19 Image to AVIF Encode an image as AVIF right in the browser.converter20 Image Compressor Reduce JPEG or WebP size with a quality slider.converter21 Image Resizer Fit an image inside a width and height.converter22 Image Cropper Drag a rectangle and export that region.converter23 Image Format Information Type, dimensions and file size from the file itself.converter24 PDF to Images Render each page to PNG or JPEG.converter25 Images to PDF Place PNG or JPEG files on PDF pages.converter26 Merge PDF Join two or more PDFs in order.converter27 Split PDF One PDF file per page.converter28 Rotate PDF Rotate every page by 90, 180 or 270 degrees.converter29 Extract PDF Pages Keep pages such as 1-3,5.converter30 Compress PDF Rewrite the PDF and report the real size change.converter31 QR Code Generator Create a QR code and download the PNG.converter32 Barcode Generator CODE128, CODE39, EAN-13 and UPC.converter33 JSON Formatter Pretty-print JSON with a chosen indent.developer34 JSON Minifier Strip insignificant JSON whitespace.developer35 JSON Validator Tell whether a document is valid JSON.developer36 JSON Tree Viewer Expand objects and arrays and copy a path.developer37 JSON Diff Structural additions, removals and changes.developer38 JSON Path Tester Query a document with JSONPath.developer39 JSON to TypeScript Infer an interface from a JSON sample.developer40 JSON to CSV Turn an array of objects into CSV.converter41 CSV to JSON Parse CSV, including quoted commas.converter42 XML Formatter Pretty-print XML and check that tags balance.developer43 YAML Formatter Parse YAML and print it in a stable form.developer44 Markdown to HTML Render Markdown and sanitize the HTML.converter45 HTML to Markdown Convert an HTML fragment into Markdown.converter46 Unix Timestamp Converter Seconds, milliseconds, ISO and local time.developer47 Color Format Converter HEX, RGB and HSL from one value.developer48 Color Picker Pick a color and read its channels.developer49 Contrast Checker WCAG contrast for two colors.developer50 Base64 Encode / Decode UTF-8 Base64, including URL-safe.developer51 URL Encode / Decode Percent-encode and decode a URL component.developer52 HTML Entity Encode / Decode Escape and unescape HTML characters.developer53 Unicode Inspector Code point, UTF-8 bytes and block for each character.developer54 JWT Decoder Read the header and payload. The signature is not verified.developer55 Hex to Text Text to hexadecimal and back.developer56 Binary to Text Bytes as 8-bit groups, and the reverse.developer57 HTML Formatter Format or minify HTML.developer58 CSS Formatter Format CSS or minify it.developer59 JavaScript Formatter Format with Prettier or minify with Terser.developer60 SQL Formatter Lay out a SQL statement.developer61 Regex Tester Highlights matches and capture groups.developer62 HTML Playground HTML, CSS and JS in a sandboxed frame.developer63 CSS Gradient Generator Build a linear gradient and copy the CSS.developer64 Box Shadow Generator Tune a shadow and copy the declaration.developer65 Flexbox Playground Direction, wrap, alignment and gap.developer66 Grid Generator Columns, rows and gap as CSS Grid.developer67 Responsive Breakpoint Preview See HTML at phone, tablet and desktop widths.developer68 UUID Generator Version 4 UUIDs from the browser CSPRNG.developer69 Lorem Ipsum Generator Paragraphs of placeholder text.developer70 Hash Generator SHA-1, SHA-256, SHA-384 and SHA-512.developer71 Cron Expression Explainer Explain a five-field cron expression.developer72 IP Address Information Classify an address you type. No network scan.developer73 Date Formatter Format a date with a token pattern.developer74 Timezone Converter Convert a civil time between IANA zones.developer75 Git Command Reference A short field guide to everyday Git.developer76 HTTP Status Codes Look up a status code.developer77 MIME Type Lookup Find a content type by extension or name.developer78 Common Regex Patterns Starting points for email, URL, numbers and more.developer79 HTML Entity Reference Named characters and their codes.developer80 CSS Unit Converter px, rem, em, pt and percent.developer81 Word Counter Words, lines, sentences and paragraphs.text82 Character Counter Characters with and without spaces.text83 Reading Time Estimate minutes at a words-per-minute pace.text84 Case Converter Upper, lower, title, camel, snake and kebab.text85 Text Cleaner Trim lines, collapse spaces and blank lines.text86 Remove Duplicate Lines Keep the first copy of each line.text87 Sort Lines Sort lines A–Z or Z–A.text88 Find & Replace Literal or regular-expression replace.text89 Text Diff Line-by-line additions and removals.text90 Markdown Preview Write Markdown and see sanitized HTML.text91 Slug Generator URL slugs, including Cyrillic and Armenian.text92 URL Parser Protocol, host, path, query and hash.text93 Email Extractor Find addresses in text you paste.text94 Text Escape / Unescape JSON, HTML, URL and Unicode escapes.text95 Whitespace Cleaner Trailing spaces, repeated blanks and non-breaking spaces.text96 JSON to YAML Turn a JSON document into YAML.developer97 YAML to JSON Turn YAML into formatted JSON.developer98 Sort JSON Keys Sort object keys recursively.developer99 Subnet Calculator Network, mask, hosts and broadcast from CIDR.developer100 Chmod Calculator Octal modes such as 755 to rwx.developer101 ROT13 Rotate letters by 13 places.developer102 Morse Code Text to Morse and back.developer103 Data URL Encode text as a base64 data URL.developer104 Line Endings Convert between LF and CRLF.developer105 Basic Auth Decoder Read user and password from a Basic header.developer106 .env Parser Turn KEY=value lines into JSON.developer107 Random String A CSPRNG string of the length you set.developer108 Strip HTML Remove tags and return the text.developer109 TSV to JSON Tab-separated rows become objects.developer110 Password Strength A local entropy estimate.developer111 Aspect Ratio Simplify a pixel width and height.developer112 Pythagorean Theorem Hypotenuse from the two legs.math113 Circle Calculator Area and circumference from the radius.math114 BMI Calculator Body mass index from weight and height.math115 Simple Interest Interest = principal × rate × time.math116 Compound Interest Interest compounded over a number of periods.math117 Combinations C(n, k) without repetition.math118 Ohm's Law Leave one of volts, amps or ohms empty.math119 API Request Sends your requestSend GET, POST, PUT, PATCH or DELETE from this browser.developer120 Loan Payment Monthly payment from principal, rate and term.math121 Tip Calculator Split a tip across people.math122 VAT Calculator Add or remove a tax rate.math123 Margin Calculator Margin, markup and profit from cost and price.math124 Hourly Wage Monthly, weekly and hourly pay from an annual amount.math125 Monthly Salary One twelfth of an annual salary.math126 Fuel Cost Cost from distance, consumption and price.math127 Pace Calculator Pace per kilometre and average speed.math128 Age Calculator Years, months and days from a birth date.math129 ISO Week Number The ISO week of a civil date.math130 Roman Numerals Convert 1–3999 to and from Roman numerals.math131 Prime Factors Factor an integer into primes.math132 Fibonacci The exact nth Fibonacci number.math133 Bitwise Calculator AND, OR, XOR and 32-bit NOT.math134 Angle Converter Degrees, radians and gradians.math135 Triangle Area Area from base and height.math136 Cylinder Volume Volume from radius and height.math137 Modulo Non-negative remainder, including negatives.math138 Logarithm Logarithm in a chosen base.math139 Golden Ratio The larger part of a length.math140 Leap Year Gregorian leap-year rule.math141 Reverse Text Reverse characters, including emoji.text142 Reverse Lines Put the last line first.text143 Word Frequency Count words and sort by frequency.text144 Line Numbers Prefix each line with its number.text145 Prefix Lines Add the same prefix to every line.text146 Extract URLs List http and https links from text.text147 Extract Numbers Pull numbers out of a paragraph.text148 Palindrome Check Ignores spaces, case and punctuation.text149 Repeat Text Repeat a string a limited number of times.text150 Wrap Text Wrap long lines near a width.text151 Remove Blank Lines Drop lines that are only whitespace.text152 Shuffle Lines Reorder lines with the browser random source.text153 Join Lines Join lines with a separator.text154 Split Text Split on a delimiter, one piece per line.text155 Tabs to Spaces Expand tabs to a fixed width.text156 Spaces to Tabs Collapse runs of spaces into tabs.text157 Remove Accents Strip combining marks from letters.text158 Character Frequency The most common characters in the text.text159 Truncate Text Cut to a character length and add an ellipsis.text160 Quote Lines Prefix every line with a Markdown quote.text161 Sort Words One word per line, in alphabetical order.text162 Count Matches Count a literal phrase.text163 Invisible Characters List control and format characters hiding in the text.text164 Semver Compare Compare two semantic versions, including prerelease.developer165 Semver Bump Raise major, minor or patch.developer166 Query Builder Turn key=value lines into a query string.developer167 Human Bytes Show a byte count in KB, MB or GB.developer168 Duration Format Seconds as hours, minutes and seconds.developer169 Path Parts Directory, name and extension.developer170 SQL IN Clause Quote lines as an SQL IN list.developer171 Markdown Table CSV rows become a Markdown table.developer172 Meta Tags Title and description tags for a page.developer173 Robots.txt Builder Allow and disallow rules for one user agent.developer174 Base32 Encode and decode Base32 text.developer175 Punycode International domain labels to and from ASCII.developer176 IPv4 Integer An IPv4 address as an unsigned integer.developer177 MAC Formatter Normalize a MAC address to colon groups.developer178 JSON Keys List every object key path.developer179 UTF-8 Length Byte length, not character length.developer180 Hex Dump UTF-8 bytes in rows of 16.developer181 CSV Delimiter Replace one delimiter with another.developer182 Lines to JSON A JSON array of the non-empty lines.developer183 Luhn Check Checksum for a card-like number. It does not contact a bank.developer184 IBAN Check Mod-97 check of an IBAN. It does not look the account up.developer185 Email Shape A practical shape check, not a mailbox lookup.developer186 Passphrase Random English words from a fixed local list.developer187 ULID Generator Sortable identifiers from time and the browser CSPRNG.developer188 CSS clamp() A clamp() declaration from three lengths.developer189 Type Scale A modular type scale in pixels.developer190 Color Shades Five lighter and darker steps of one hex color.developer191 Complementary Color The opposite hue of a hex color.developer192 Spacing Scale A spacing ramp from a base and a ratio.developer193 SVG Placeholder A small SVG with a label. No image host.developer194 Redirect Rule An Apache Redirect line for 301 or 302.developer195 HTML Table CSV rows become table cells.developer196 Letter Avatar An SVG avatar from one letter.developer197 CSS Radius A border-radius declaration.developer198 CSS Filter Blur and brightness as a filter declaration.developer199 JSON Size UTF-8 byte size of the text you pasted.developer200 Data Rate Bytes over seconds, shown in human units.developer201 Strip Comments Remove //, # and /* */ comments from text.developer
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How many tools are there?
More than 200, grouped into math, converters, developer utilities, design and text. New ones are added regularly.
Can I search in Russian or Armenian?
Yes. Names and aliases are indexed in English, Russian and Armenian, so any of them finds the tool.
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