Free tools

Meta Tags Checker

Check any page's title, meta description, canonical, robots and heading structure, and see the exact issues that hurt its rankings.

Open Graph Preview

Preview how your page looks when shared on X, LinkedIn, Slack and Facebook, and find the Open Graph tags you are missing.

WHOIS Lookup

Look up any domain's registrar, registration date, expiry, status codes and nameservers using live RDAP registry data.

Domain Age Checker

Find out exactly how old a domain is, when it was registered, when it was last changed and when it expires.

UTM Builder

Build tagged campaign URLs with consistent utm_source, utm_medium and utm_campaign values so your launch traffic is actually attributable.

JWT Decoder

Paste a JSON Web Token to decode its header and payload and read every claim, including expiry. Runs entirely in your browser.

JSON Formatter

Format, validate and minify JSON in your browser. Get the exact line and column of a syntax error instead of a vague parse failure.

UUID Generator

Generate cryptographically random UUID v4s, or time-ordered UUID v7s that index far better as database primary keys.

SEO Checker

Run eleven on-page checks against any URL: title, description, canonical, headings, alt text, Open Graph, word count and indexability, with the exact fixes.

Redirect Checker

Follow every hop a URL takes, see the status code at each step, and find the chains, loops and temporary redirects that leak link equity.

Broken Link Checker

Crawl any page for broken links, see the status code behind every dead URL, and separate the internal ones that cost you link equity from the external rot.

Backlink Verifier

Check whether a page really links to your domain, what rel attribute the link carries, and whether the page is indexable at all.

Outbound Link Checker

List every external link on a page with its rel attribute, count how many pass equity, and catch affiliate links that should be marked sponsored.

DNS Lookup

Query every common DNS record type for any domain at once, with TTLs, resolved through Cloudflare's public DNS-over-HTTPS resolver.

Domain Popularity Checker

Check how popular any domain is on a 0-100 score built from the Tranco top-million ranking, with its raw rank and 30-day movement.

Bulk Domain Popularity

Score up to twenty-five domains at once against the Tranco top-million ranking and sort them, so you can triage a link prospect list in one pass.

Bulk Domain Checker

Check whether 25 domains are registered or free in one pass, straight from the registry over RDAP, with no signup and no upsell to a registrar.

Keyword Idea Generator

Turn one seed keyword into the questions, comparisons and commercial queries people actually type, pulled live from Google autocomplete.

robots.txt Generator

Build a valid robots.txt with your disallow rules, sitemap reference and optional AI crawler blocks, ready to paste at the root of your site.

llms.txt Generator

Generate an llms.txt file that tells AI answer engines what your product is and which pages matter, in the markdown format the proposal specifies.

Schema Markup Generator

Generate valid JSON-LD for Organization, SoftwareApplication, Article and BreadcrumbList, ready to paste into your page head.

FAQ Schema Generator

Turn a list of questions and answers into valid FAQPage JSON-LD, the structured data AI answer engines quote most readily.

Word Counter

Count words, characters, sentences and paragraphs, with reading time, speaking time and a Flesch readability score. Everything runs in your browser.

Reading Time Calculator

Estimate how long your article takes to read and to speak aloud, so you can put an honest number at the top of the page.

Keyword Density Checker

See which words your content actually repeats and at what percentage, with stop words excluded, so you can spot keyword stuffing before publishing.

Readability Checker

Score your writing on Flesch Reading Ease, Flesch-Kincaid, Gunning Fog, SMOG and Coleman-Liau at once, and see which one your text fails.

Flesch Reading Ease Calculator

Score any text on the Flesch Reading Ease scale from 0 to 100, see the audience it reads for, and get the sentence length and syllable numbers behind the score.

Flesch-Kincaid Grade Level Calculator

Get the US school grade level any text is written for, using the Flesch-Kincaid formula, plus the sentence length and syllable numbers behind the result.

Gunning Fog Index Calculator

Calculate the Gunning Fog index of any text, see how many of your words are complex, and find out the years of education a reader needs to follow it.

QR Code Generator

Generate a QR code for any URL or text with adjustable error correction, and download it as a high-resolution PNG. No signup, no tracking, no expiry.

Regex Tester

Test a JavaScript regular expression against sample text, see every match with its position and capture groups, and get real errors for invalid patterns.

Base64 Encode / Decode

Encode text to base64 or decode it back, with full UTF-8 support and automatic handling of base64url input. Runs entirely in your browser.

Image Resizer

Resize PNG, JPG, WebP and GIF images to exact pixel dimensions with aspect ratio locked. Runs entirely in your browser - no upload, no queue, no watermark.

Image Compressor

Compress JPG and PNG images with a live quality slider and see the exact size saving before you download. Everything runs in your browser.

SVG to PNG

Convert an SVG to a PNG at 1x to 8x scale, so logos and icons export crisp at whatever pixel size you need. Runs in your browser.

Favicon Generator

Turn any image into the five favicon sizes browsers and mobile devices actually request, and get the HTML link tags to paste into your head.

PNG to WebP

Convert PNG and JPG images to WebP with a quality slider, and see exactly how many bytes you saved before downloading.

Barcode Generator

Generate Code 128, EAN-13, UPC-A, Code 39, ITF-14, MSI and Pharmacode barcodes and download them as PNG. Runs entirely in your browser.

Code 128 Barcode Generator

Generate a Code 128 barcode from any text or number and download it as a PNG. Full ASCII, automatic subset switching, no signup and nothing uploaded.

EAN-13 Barcode Generator

Generate a valid EAN-13 retail barcode, with the check digit calculated for you, and download it as a print-ready PNG. Free, no signup, nothing uploaded.

UPC Barcode Generator

Generate a 12-digit UPC-A retail barcode with the check digit calculated automatically, and download it as a print-ready PNG. Free and entirely in your browser.

Code 39 Barcode Generator

Generate a Code 39 barcode from uppercase letters, digits and a handful of symbols, and download it as a PNG. Free, no signup, runs in your browser.

ITF-14 Barcode Generator

Generate an ITF-14 carton barcode from a 13 or 14 digit GTIN and download it as a PNG. Free, no signup, and the check digit is handled for you.

Morse Code Translator

Translate text to Morse code and Morse back to text, covering letters, digits and punctuation. Runs in your browser with no signup.

Percentage Calculator

Work out X% of Y, what percentage one number is of another, and percentage increase or decrease between two values.

Roman Numeral Converter

Convert numbers to roman numerals and roman numerals back to numbers, with validation that rejects malformed numerals like IIII.

Unit Converter

Convert between metric and imperial units for length, weight, volume, time, digital storage and temperature, with exact conversion factors.

WebP to PNG

Convert WebP images to PNG for tools and platforms that will not accept WebP. Transparency is preserved and nothing is uploaded.

Epoch Converter

Convert Unix timestamps to human-readable dates and back, handling both seconds and milliseconds, with UTC, ISO 8601 and local output.

Caesar Cipher

Shift letters by any amount to encode or decode a Caesar cipher, including ROT13, with all 25 possible shifts shown at once for cracking.

Image Color Picker

Click anywhere on an image to read the exact colour as HEX, RGB and HSL, and keep a palette of everything you picked. Nothing is uploaded.

Subnet Calculator

Enter any IPv4 address in CIDR notation to get the network and broadcast addresses, usable host range, subnet mask, wildcard mask and host count.

Wildcard Mask Calculator

Convert a CIDR prefix or subnet into the wildcard mask Cisco ACLs and OSPF network statements expect, with the subnet mask and address range alongside it.

PNG to PDF

Turn a PNG, JPG or screenshot into a PDF in your browser. No upload, no signup, no watermark - the file never leaves your device.

PDF to PNG

Render every page of a PDF as a high-resolution PNG in your browser. Nothing is uploaded, there is no page limit and there is no watermark.

PNG to JPG

Convert a PNG to JPG in your browser with a quality slider, and see exactly how much smaller the result is before you download it.

JPG to PNG

Convert a JPG to lossless PNG in your browser, ready for editing, transparency work or any tool that refuses JPEG.

Character Counter

Count characters with and without spaces in real time, plus words, sentences and paragraphs, against the limits for meta descriptions, X posts and bios.

Case Converter

Convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case and kebab-case in one click.

Diff Checker

Paste two versions of a text and see every added and removed line highlighted, computed in your browser with no upload.

Aspect Ratio Calculator

Work out the missing width or height for any aspect ratio, simplify the ratio of any two dimensions, and check the megapixel count.

Color Converter

Convert HEX to RGB and back, get the HSL equivalent, and see the contrast ratio against white and black for accessibility checks.

CSV to JSON

Turn a CSV into an array of JSON objects in your browser, with proper handling of quoted fields, embedded commas and custom delimiters.

JSON to CSV

Convert a JSON array into a CSV you can open in Excel or Google Sheets, with headers taken from every key that appears.

Password Generator

Generate strong random passwords in your browser using the Web Crypto API, with an entropy figure so you can see how strong they actually are.

Lorem Ipsum Generator

Generate as many paragraphs of lorem ipsum placeholder text as your mockup needs, starting with the classic opening or fully random.

Minecraft Circle Generator

Generate a block-perfect circle or sphere outline for any diameter, see exactly how many blocks it takes, and copy the pattern as text.

Color Mixer

Mix paint colours and see the result instantly. Answers what colours make brown, green, orange and purple using real subtractive mixing, not screen colours.

Random Letter Generator

Generate one random letter or a whole string of them. Pick uppercase or lowercase, restrict to vowels or consonants, and rule out repeats.

Random Number Generator

Pick a random number between any two values. Draw one or draw hundreds, sorted, with or without repeats - for giveaways, raffles and classrooms.

Random Group Generator

Paste a list of names and split it into random teams. Choose the number of groups or the people per group, and get evenly sized results every time.

Pictionary Word Generator

Draw random Pictionary or charades words at three difficulty levels. No signup, no ads, and nobody at the table has to think them up.

Valorant Crosshair Generator

Design a Valorant crosshair with live preview - colour, centre dot, inner and outer lines - and copy the profile code straight into the game.

Reaction Time Test

Measure how fast you react, in milliseconds. Click the moment the box turns green, run as many rounds as you like, and see your average, median and best.

F1 Reaction Time Test

Five red lights, a random hold, then lights out. React like a Formula 1 driver on the grid and see whether you would have jumped the start.

Fake Tweet Generator

Build a realistic tweet image for a mockup, a talk or a joke. Set the name, handle, avatar, counts and theme, then download a PNG. No watermark, no signup.

Fake Instagram Story Generator

Make a 1080 x 1920 Instagram story image with the username bar, progress bar and caption. Upload a photo or pick a gradient, then download the PNG.