All free online tools
Browse the complete collection of browser-based utilities. 46 single-purpose tools across 12 categories — each loads in under a second and processes your input locally in this tab.
Showing 46 of 46 tools
AI Prompt Writer
Turn a simple idea into a clear, structured prompt for any AI assistant.
AI writing toolsAI Rewriter
Rewrite sentences, paragraphs and articles in a new style while keeping the meaning.
AI writing toolsAndroid WebView App Builder
Turn a website into a full-screen Android Studio WebView project — icon, splash, permissions and all.
App builder toolsApp Icon Generator
One square image in, every PWA and Android launcher icon out — including maskable and favicon.ico.
App builder toolsAspect Ratio Calculator
Work out the missing width or height for any target ratio.
CalculatorsBase64 Encoder & Decoder
Convert text to Base64 and back, with UTF-8 handled correctly.
Developer toolsBroken Link Checker
Check every link on a page and list the ones that fail.
Website toolsCase Converter
Switch text between sentence, title, upper, lower, camel and snake case.
Text toolsColor Converter
Convert colours between HEX, RGB and HSL notation.
Image toolsCSV to JSON Converter
Convert delimited spreadsheet data into an array of JSON objects.
Developer toolsFile Format Converter
Batch-convert images between PNG, JPEG and WebP in the browser.
File toolsFiles to ZIP
Bundle any set of files into one compressed archive locally.
File toolsGrammar Fix
Fix grammar, spelling, punctuation and sentence structure while keeping your meaning.
AI writing toolsHash Generator
Compute SHA-1, SHA-256, SHA-384 and SHA-512 digests of any text.
Developer toolsHTTP Status Checker
Read the status code, headers and redirect chain returned by any URL.
Website toolsImage Compressor
Shrink JPEG, PNG and WebP files in your browser with a quality slider.
Image toolsImage to Base64
Convert an image into a data URI you can paste into CSS or HTML.
Image toolsImages to PDF
Combine JPEG and PNG files into a single ordered PDF document.
PDF toolsJSON Formatter & Validator
Pretty-print, minify and validate JSON with precise error positions.
Developer toolsKeyword Density Checker
Count term frequency in a draft and spot accidental repetition.
SEO toolsLorem Ipsum Generator
Generate placeholder paragraphs, sentences or words for layouts.
Text toolsMerge PDF
Join several PDFs into one file, in the order you choose.
PDF toolsMeta Tag Generator
Produce title, description, Open Graph and Twitter tags for any page.
SEO toolsPDF Compressor
Rebuild a PDF with tighter object streams and drop unused data.
PDF toolsPDF to Images
Render every page of a PDF to PNG or JPEG and download them as a ZIP.
PDF toolsPercentage Calculator
Percentages, increases, decreases and differences with the working shown.
CalculatorsPWA App Builder
Generate the manifest, icons, service worker and offline page a website needs to become installable.
App builder toolsReading Time Calculator
Estimate silent reading and spoken delivery time from a word count.
CalculatorsRedirect Checker
Follow a redirect chain hop by hop and find loops or extra steps.
Website toolsRobots.txt Generator
Build a valid robots.txt with crawl rules and a sitemap reference.
SEO toolsRotate PDF
Turn every page 90, 180 or 270 degrees and save the fixed file.
PDF toolsSERP Snippet Preview
See how a title and description will truncate in search results.
SEO toolsShopify Theme Detector
Reveal the Shopify theme name, ID and role published on a storefront.
Website toolsSitemap URL Extractor
Pull every URL out of a site's XML sitemap, including sitemap index files.
Website toolsSplit PDF
Extract a page range into a new document, or burst every page.
PDF toolsText Diff Checker
Compare two blocks of text and highlight every line that changed.
Text toolsURL Encoder & Decoder
Percent-encode query values or decode an escaped URL.
Developer toolsURL Slug Generator
Turn any headline into a clean, lowercase, hyphenated URL slug.
Text toolsUUID Generator
Generate cryptographically random version 4 UUIDs in bulk.
Developer toolsWeb App Manifest Generator
Build a valid manifest.webmanifest field by field, with live JSON and a copy button.
App builder toolsWebsite ClonerFlagship
Clone a public website and download HTML, CSS, JavaScript, images and fonts as a ZIP.
Website toolsWebsite Email Finder
Collect the email addresses a page already publishes in its own HTML.
Website toolsWebsite Technology Detector
See the CMS, framework, analytics and hosting signals behind any public page.
Website toolsWord Counter
Live word, character, sentence and reading-time counts.
Text toolsWordPress Theme Detector
Find the active theme folder and visible plugins on a WordPress site.
Website toolsZIP Extractor
Open a ZIP archive and download individual files from it.
File toolsBrowse by category
Website tools
Clone, inspect and audit public websites from one place.
9 tools →
App builder tools
Turn a website into an installable PWA or an Android WebView app.
4 tools →
AI writing tools
Fix grammar, rewrite text and build better AI prompts.
3 tools →
Text tools
Clean up, count, convert and reshape written content.
5 tools →
Developer tools
Format, encode, decode and inspect the data you work with daily.
6 tools →
SEO tools
Draft metadata, previews and crawl directives without a subscription.
4 tools →
Image tools
Compress, convert and inspect images entirely on-device.
3 tools →
Calculators
Quick numeric answers for design, content and everyday work.
3 tools →
PDF tools
Compress, split, merge and convert PDFs without an upload.
6 tools →
File tools
Convert, bundle and inspect files locally in the browser.
3 tools →
Generators
Produce boilerplate, identifiers, placeholder data and markup.
0 tools →
Other tools
Utilities that do not fit a neat box but still save an hour.
0 tools →