Passalibro
Share books with Passalibro bookcrossing.
Open PassalibroUseful micro webapps
Small, fast, free tools with no frills.
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Finance & Codes
Fiscal Code Validator
Verify the format and check digit of the Italian fiscal code in seconds.
Open Fiscal Code ValidatorIBAN Validator
Check an IBAN with mod 97 and see the country and bank details.
Open IBAN ValidatorIBAN → BBAN Calculator
Validate the IBAN and quickly extract its BBAN and CIN fields when available.
Open IBAN → BBAN CalculatorVAT Calculator
Convert between net and gross amounts with custom or standard VAT in a click.
Open VAT CalculatorAsset depreciation calculator
Build straight-line or declining balance schedules with CSV export and pro-rata.
Open Asset depreciation calculatorLeasing Calculator
Build French or Italian leasing schedules with totals and CSV export.
Open Leasing CalculatorText & Conversion
Lorem Ipsum Generator
Generate placeholder text by paragraphs, chapters or words.
Open Lorem Ipsum GeneratorWord Count
Count words, characters and reading time.
Open Word CountCSV ↔ JSON
Convert pasted data between CSV and JSON.
Open CSV ↔ JSONPDF Text Cleaner
Removes unwanted line breaks, double spaces and wrong capitals.
Open PDF Text CleanerPDF signature validator (client-side)
Inspect a PDF locally and validate embedded PAdES signatures without uploading the file.
Open PDF signature validator (client-side)Diff Checker
Highlight differences between two texts.
Open Diff CheckerNamed-Entity Redactor
Mask or tokenize sensitive entities (names, emails, IBANs) locally.
Open Named-Entity RedactorLocal text classifier
Estimate sentiment and main language offline with TensorFlow.js.
Open Local text classifierEditorial page estimator
Estimate Italian editorial pages from a text.
Open Editorial page estimatorCalculators & Generators
Random Number Generator
Generate a random integer within a range.
Open Random Number GeneratorDigital Dice
Choose how many dice to roll and see the results.
Open Digital DiceUnit Converter
Convert length, weight and temperature.
Open Unit ConverterQR Code Generator
Generate a PNG QR code from text or links.
Open QR Code GeneratorBarcode Generator
Generate an EAN-13 or UPC-A barcode image.
Open Barcode GeneratorTyping Speed Test
Measure WPM and accuracy by typing a given text.
Open Typing Speed TestPythagorean Numerology
Compute core numbers from name and birth date.
Open Pythagorean NumerologyWeb & SEO
UTM Builder
Generate URLs with UTM parameters for campaigns.
Open UTM BuilderRegex Tester
Test regular expressions against text.
Open Regex TesterBase64 & URL Encode/Decode
Convert strings to Base64, Base64url and URL encoding locally.
Open Base64 & URL Encode/DecodeProvince Lookup
Find Italian province by code or name.
Open Province LookupSSL Info
Fetch certificate CN and validity for a domain.
Open SSL InfoDNS Lookup
Show A, AAAA, CNAME records and resolved IP for a domain.
Open DNS LookupWHOIS & Registrant Lookup
Query public RDAP data to view registrar, registrant and key dates for a domain.
Open WHOIS & Registrant LookupBatch HTTP Status
Check HTTP status codes for multiple URLs.
Open Batch HTTP StatusMeta Tag Analyzer
Fetch page and list SEO meta tags.
Open Meta Tag AnalyzerRobots.txt Tester
Check if URL is allowed for a user-agent.
Open Robots.txt TesterRedirect Checker
Follow redirect chain for a URL.
Open Redirect CheckerRedirect Mapper
Visualise redirect chains as an interactive graph with timings and issues.
Open Redirect MapperResource Check
Fetch a page, list essential JS/CSS resources and check robots blocking.
Open Resource CheckSitemap Viewer
Fetch sitemap.xml and list URLs.
Open Sitemap ViewerSitemap Generator
Light crawl to build sitemap XML.
Open Sitemap GeneratorHreflang Checker
Extract and verify alternate hreflang links.
Open Hreflang CheckerSocial Preview
Show Open Graph/Twitter card preview for a URL.
Open Social PreviewHeaders Viewer
Show HTTP response headers for a URL.
Open Headers ViewerSchema.org Detector
Detect JSON-LD and Microdata from a URL.
Open Schema.org DetectorSchema Markup Builder
Generate JSON-LD for Organization, LocalBusiness and Article with a guided wizard.
Open Schema Markup BuilderBroken Links Checker
Download a page and report links returning 4xx/5xx.
Open Broken Links CheckerCompression Check
Verify if response is compressed and estimate saving.
Open Compression CheckCache Policy Checker
Read Cache-Control, ETag and Last-Modified headers and suggest improvements.
Open Cache Policy CheckerCanonical Consistency
Check canonical tag presence and consistency with requested URL.
Open Canonical ConsistencyJWT Decoder
Inspect header, payload and signature of a JSON Web Token locally.
Open JWT DecoderMobile Tag Checker
Check meta viewport and main image sizes and suggest basic fixes.
Open Mobile Tag CheckerOther tools
VAT Number Checker
Validate the Italian format and check the VIES registration.
Open VAT Number CheckerPDF Table Extractor
Extract tables from text-based PDFs and export them to CSV, JSON or XLSX without leaving the browser.
Open PDF Table ExtractorSlug Generator
Build SEO-friendly slugs from Italian titles.
Open Slug GeneratorCron Expression Tester
Validate a cron expression and preview the next runs in the selected time zone.
Open Cron Expression Tester103 Early Hints Checker
Check if a URL supports HTTP 103 Early Hints and review Link hints sent before the final response.
Open 103 Early Hints CheckerSecurity Headers Checker
Analyze HTTP security headers and get actionable hardening tips.
Open Security Headers Checker