All tools

102 tools across 13 families. Every one runs entirely in your browser: no sign-up, no upload, and the same rule and worked example stated on each page.

Scripts & writing

Scripts & numerals

Digits, writing systems and transliteration, converted losslessly.

Numeral System ConverterConvert digits across 22 writing systems — Thai ๐, Devanagari ०, Arabic-Indic ٠, Khmer ០, full-width ０ and more — and normalise mixed text to 0–9.Roman Numerals ConverterConvert 1–3999 both ways, and reject non-canonical forms such as IIII or VX instead of guessing.Kana ConverterHiragana ↔ katakana ↔ Hepburn romaji, with digraphs and the sokuon handled.Cyrillic TransliterationRussian Cyrillic ↔ Latin: reversible ISO 9 or English-readable (Moskva, Zhukov), with the full alphabet table.Chinese Numerals ConverterNumbers ↔ Chinese numerals in both the everyday 一二三 form and the financial 壹贰叁 form used on cheques and invoices.Number to WordsSpell any number out in English, with or without “and”, and write cheque-style amounts with the units and cents in words.Pinyin Tone ConverterSwitch pinyin between tone marks and tone numbers: nǐhǎo ↔ ni3hao3, with the standard mark-placement rule and v for ü.

Accents & diacritics

Strip the marks that break search, matching and filenames.

Remove Vietnamese AccentsStrip tone marks and diacritics: Tiếng Việt → Tieng Viet, including đ/Đ, plus the spreadsheet approach.

Phonetic & symbol writing

Spell text in other symbolic systems: Morse, Braille, radio alphabet.

Morse Code TranslatorText ↔ International Morse code using the ITU table, with a clear word separator.Braille TranslatorText ↔ Unicode Braille Patterns (Grade 1), with the number sign and capital sign handled.NATO Phonetic AlphabetSpell any text as Alfa, Bravo, Charlie so names and codes are understood first time.

Text utilities

Everyday clean-up: counting, case, whitespace, slugs and lines.

Character & Word CounterCharacters, characters without spaces, words, lines, sentences and UTF-8 bytes, updated as you type.Typing Speed TestMeasure net WPM and accuracy on a fixed passage, with the five-character-word formula stated on the page.Case ConverterUPPER, lower, Title and Sentence case, with the exact Excel or Google Sheets formula for each mode.Whitespace & Invisible CleanerFind and remove zero-width characters and non-breaking spaces, collapse whitespace and trim lines.Slug GeneratorTurn any title into a clean URL slug, folding accents so Đà Nẵng becomes da-nang.Line ToolsSort, deduplicate, reverse, shuffle or number lines — locally, in one paste.Upside-Down TextFlip text with Unicode characters that look rotated 180°, ready to copy and paste.Remove Line BreaksRemove the hard line breaks that come with text copied from a PDF and rejoin it — with a space, with nothing, or by collapsing blank lines.Word Frequency CounterRank the words in your text by how often they occur, with each word’s share of the total and a CSV export.Text RepeaterRepeat a word, line or emoji as many times as you need, with a new line, a space, nothing or your own separator between copies.Zalgo Text GeneratorGlitch text with stacked combining marks at four intensities, and strip them back out to readable text.Fancy Text GeneratorRestyle text in twelve Unicode alphabets — bold, italic, script, fraktur, double-struck, monospace, circled, small caps and more.HTML to Markdown ConverterTurn pasted HTML into clean Markdown — headings, lists, links, emphasis, code, blockquotes and tables — with nothing uploaded.Markdown to HTML ConverterRender Markdown to HTML: headings, lists, emphasis, links, images, code fences, blockquotes and tables, live as you type.Markdown Table GeneratorBuild a Markdown table from pasted rows with per-column alignment, or paste a spreadsheet grid and get the table instantly.

Data & code

Encoding & Unicode

What the bytes and code points of your text actually are.

Unicode InspectorSee every code point, its hexadecimal value, UTF-8 bytes and Unicode category — the fastest way to find invisible characters.Binary & Hex Text ConverterText ↔ binary, hex, octal or decimal bytes using UTF-8, so accented letters, CJK and emoji round-trip.Full-width ConverterConvert full-width ＡＢＣ１２３ to half-width ABC123 and back, for CJK typography and form fields.Superscript & SubscriptWrite x², H₂O and ⁴² as real Unicode superscript or subscript characters.HTML Entity Encoder & DecoderEscape text to HTML entities and decode them back — the five specials, every non-ASCII character, or the whole string — with named entities like © and — recognised.Hex to Text ConverterConvert hexadecimal bytes to text and back, as UTF-8 or raw bytes, with the same spacing rules every other hex tool uses.UTF-8 & Code Point InspectorSee the code point and UTF-8 bytes of every character, and convert text to and from u-escape sequences.

Developer & data

Encode, format and generate the values developers pass between systems.

Base64 Encoder & DecoderEncode text to Base64 and decode it back, correct for accents, CJK and emoji because the bytes are handled as UTF-8.URL Encoder & DecoderPercent-encode a value or a whole URL and decode it back, with the two modes (query component vs full URL) explained.JSON Formatter & ValidatorPretty-print or minify JSON and see exactly where invalid JSON fails, line and column included.UUID GeneratorGenerate random RFC 4122 version-4 UUIDs in bulk, ready to copy as a list.Hash Generator (SHA-1/256/384/512)Compute a SHA-1, SHA-256, SHA-384 or SHA-512 hash of any text using the browser’s own WebCrypto implementation.File Hash CalculatorCompute the SHA-256, SHA-1, SHA-384 and SHA-512 checksums of any file and verify it against a published hash — without uploading the file.SQL Formatter & BeautifierFormat a SQL query into readable, indented clauses or minify it back to one line, with keyword-case control. Handles SELECT, JOINs and subqueries.Cron Expression GeneratorBuild, validate and read cron expressions in plain English, with the next run times in your timezone — Unix and Quartz syntax.JWT DecoderDecode a JSON Web Token in your browser — read the header and payload as JSON and check exp/iat/nbf, with a clear warning that the signature is not verified.TOTP / 2FA Code GeneratorGenerate the current 6-digit two-factor code from a base32 secret or otpauth:// link, with a live countdown — the secret never leaves your browser.Regex Tester & DebuggerTest a JavaScript regular expression against your text — every match and capture group highlighted, compile errors explained, and a replacement preview.CSV to JSON ConverterConvert CSV to a JSON array of objects, handling quoted fields, commas and line breaks, with auto delimiter detection and a header-row toggle.JSON to TableTurn an array of JSON objects into a readable HTML table (and copy it as Markdown, CSV or TSV), with columns unioned across rows.Text Diff & CompareCompare two texts and see exactly what changed — a line diff for code and a word diff for prose, with unified or side-by-side output.JSON, YAML, TOML & XML ConverterConvert a document between JSON, YAML, TOML and XML in any direction — attributes, nesting and key order preserved, entirely in your browser.Fake Data GeneratorGenerate realistic placeholder records — names, emails, addresses, numbers, dates, UUIDs — from a seed, and export as CSV or JSON.CSV Viewer & ConverterOpen a CSV as a sortable table, or convert it to JSON, Markdown or an HTML table, with delimiter and header detection.HTTP Status CodesA searchable reference of HTTP status codes — meaning, category and class — with the code itself as the lookup key.Punycode ConverterConvert an internationalised domain name between Unicode and its ASCII punycode form (xn--), label by label — münchen.de ↔ xn--mnchen-3ya.de.File Signature CheckerIdentify a file from its magic bytes rather than its extension, see the hex dump, and catch a name that disagrees with the content.Paper Size ChartEvery ISO A, B and C paper size plus the US sizes, in millimetres, inches and pixels at any DPI, with the nearest standard size to a custom dimension.Subnet CalculatorWork out the network, broadcast, host range and mask for any IPv4 CIDR block — split a subnet, find its supernet, or test whether an address belongs.Password GeneratorGenerate a strong random password or a memorable word passphrase with a cryptographic source, showing the real entropy and a crack-time estimate. Nothing to type.Encrypt Text (AES-256-GCM)Encrypt and decrypt a message with a passphrase using AES-256-GCM and PBKDF2, entirely in your browser — the key is never stored and nothing is uploaded.

Converters

Converters & calculators

Unit, money and grade calculators that show the method, not just the answer.

Unit ConverterConvert length, mass, temperature, digital storage and time, showing the exact factor behind the result.Number Base ConverterConvert numbers between binary, decimal, hexadecimal, octal and any base from 2 to 36 — exact for long values, entirely in your browser.Debt Payoff CalculatorSee which debt to pay first, your debt-free month and the interest you will pay — with the snowball and avalanche methods compared side by side.GPA CalculatorWork out semester, weighted and cumulative GPA from letters, percentages or grade points, and the GPA still needed to reach a target.Loan CalculatorWork out the monthly payment on a fixed-rate loan, the total interest and a full amortisation schedule from the amount, rate and term.Compound Interest CalculatorProject how a lump sum and monthly contributions grow with compound interest, with a year-by-year split of contributions and interest earned.Savings Goal CalculatorSee how many months it takes to reach a savings target from a starting amount, a monthly saving and an interest rate.Percentage CalculatorA percent of a value, one number as a percent of another, percentage change, and increase or decrease by a percent — four calculators in one page.Profit Margin CalculatorProfit margin and markup from cost and selling price, the price for a target margin, and a margin ↔ markup converter.Markup CalculatorMarkup percentage from cost and selling price, the selling price for a target markup, and a markup ↔ margin converter with a reference table.ROI CalculatorReturn on investment from the amount invested and its final value — the net gain, the ROI percentage, and the annualised (CAGR) rate.Break-Even CalculatorThe break-even point in units and revenue from fixed costs, selling price and variable cost — plus the profit at any sales volume.Commission CalculatorCommission earned on a sale at any rate, the amount kept afterwards, and the rate implied by a payout you were given.Aspect Ratio CalculatorSimplify a width:height ratio, scale one side to a target size, fit to a box and find common resolutions that match.

Colour

Move a colour between HEX, RGB and HSL without a design tool.

Colour Converter (HEX · RGB · HSL)Read a colour however it is written — #4682b4, rgb(70,130,180) or hsl(210,14%,49%) — and convert it between HEX, RGB and HSL with a live swatch.Color Palette GeneratorExtract a colour palette from an image and build complementary, analogous, triadic or monochromatic schemes — with hex codes and contrast checks.Color Contrast CheckerCheck the WCAG contrast ratio between text and background colours, with AA/AAA pass labels and a suggested fix.

CSS & design

Generate gradients, shadows, radii and shapes as copy-ready CSS.

CSS Gradient GeneratorBuild a linear, radial or conic CSS gradient with colour stops and copy the ready-to-paste background declaration.CSS Box Shadow GeneratorDesign a box-shadow with an offset, blur, spread, colour and inset toggle, preview it live and copy the CSS.CSS Border Radius GeneratorSet a border radius for each corner (or all at once) and copy the shortest equivalent CSS shorthand.CSS Triangle GeneratorMake a pure-CSS triangle pointing any direction from the border trick, with the size and colour you choose.

Time & date

Timestamps and dates, converted without a timezone surprise.

Unix Timestamp ConverterConvert between Unix timestamps in seconds or milliseconds and ISO 8601, with the UTC result and a relative time.Date Difference CalculatorCount the days, weekdays, weeks and years between two dates, and add or subtract days from any date — with the calendar breakdown spelled out.Week Number CalculatorFind the ISO 8601 week number and week-numbering year for any date, and see the Monday-to-Sunday range that week covers.Age CalculatorAge from a date of birth on any date: years, months and days, total days, weeks and months lived, and the countdown to the next birthday.

Media & files

Images

Resize, convert, compress, crop and inspect images without uploading them.

Image to Base64 ConverterConvert an image file to a base64 data URL for HTML, CSS or JSON, or paste a data URL to preview it and check its type and decoded size.Image Resizer & CompressorResize an image by pixel width, height, percentage or a bounding box, convert between JPEG, PNG and WebP, and cut the file size — entirely in your browser.Image StitcherCombine several images into one — stacked vertically, side by side, or in a grid — and download the result. Processed in your browser.Image Grid SplitterSlice an image into equal tiles — a 3×3 Instagram grid, rows, or columns — and download each piece. Runs entirely in your browser.PNG to ICO ConverterTurn a PNG into a multi-size Windows .ico favicon (16/32/48 px) packed into one file, ready to download.EXIF ViewerRead the EXIF metadata a photo carries — camera, lens settings, date taken and orientation — without uploading it.SVG OptimizerShrink an SVG by stripping comments, metadata and whitespace and rounding coordinates — without changing how it renders.SVG to PNG ConverterConvert an SVG to a PNG at any size, with a transparent or solid background, entirely in your browser.Image CropperCrop an image with a draggable selection or exact pixel coordinates, then download the result — entirely in your browser.Rotate & Flip ImageRotate an image in lossless 90° steps and mirror it horizontally or vertically, then download — no upload.Image Format ConverterConvert an image between JPEG, PNG and WebP without resizing, with a quality control and a before/after size comparison.Image CompressorCompress an image to a target size in KB or MB — the best quality that fits, shrinking dimensions only when it must. Nothing is uploaded.Placeholder Image GeneratorGenerate a placeholder image at any size with custom colours and text, as a copy-ready SVG data URL or a downloadable PNG.Image WatermarkStamp text or a logo onto an image — position, opacity, size and tiling — and download the result. The image is processed in your browser.Favicon GeneratorTurn an image or emoji into a favicon in every size, with a ready-to-paste HTML snippet and a downloadable PNG set — no upload.

Documents

Business paperwork — invoices, receipts — generated in the browser.

Invoice GeneratorCreate a professional invoice with line items, tax, discount and deposit totalled automatically, then print or save it as a PDF. No account, nothing uploaded.Receipt GeneratorMake a simple printable receipt — items, tax, amount tendered and change calculated live — ready to print or save as a PDF. No account, nothing uploaded.

QR & codes

Machine-readable codes: QR, barcodes, and the subtitle formats players read.

Barcode GeneratorGenerate a Code 128 or EAN-13 barcode from your data, with a human-readable label, and download it as PNG or SVG.Subtitle ConverterConvert subtitles between SRT, WebVTT and ASS/SSA formats, keeping the cue timing and text intact.QR Code GeneratorMake a QR code for a website, plain text, a Wi-Fi network, a vCard contact, an email, an SMS, a phone number, a map location or a UPI payment — and download it as SVG or PNG.

How these are built

Each tool applies one documented rule — a Unicode block, a normalisation form, a standard romanisation or the relevant national orthography — states it on the page, and shows a worked example. See the methodology for the standard behind every tool and the editorial policy for how content is written, reviewed and corrected.

Tool families

Scripts & numerals — Digits, writing systems and transliteration, converted losslessly. (7 tools)
Encoding & Unicode — What the bytes and code points of your text actually are. (7 tools)
Accents & diacritics — Strip the marks that break search, matching and filenames. (1 tool)
Phonetic & symbol writing — Spell text in other symbolic systems: Morse, Braille, radio alphabet. (3 tools)
Text utilities — Everyday clean-up: counting, case, whitespace, slugs and lines. (15 tools)
Developer & data — Encode, format and generate the values developers pass between systems. (24 tools)
Time & date — Timestamps and dates, converted without a timezone surprise. (4 tools)
Converters & calculators — Unit, money and grade calculators that show the method, not just the answer. (14 tools)
Colour — Move a colour between HEX, RGB and HSL without a design tool. (3 tools)
Images — Resize, convert, compress, crop and inspect images without uploading them. (15 tools)
Documents — Business paperwork — invoices, receipts — generated in the browser. (2 tools)
CSS & design — Generate gradients, shadows, radii and shapes as copy-ready CSS. (4 tools)
QR & codes — Machine-readable codes: QR, barcodes, and the subtitle formats players read. (3 tools)