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FlexinaTools

46 free online tools for PDF, images, e-invoicing, VAT and everyday calculations. No sign-up, no upload โ€” everything runs locally in your browser.

FlexinaTools is a free, browser-based suite of 46 utility tools for business, documents, home projects, and tech tasks, built by Flexina, with everything processed locally so no files or data ever leave the user's device.

  • 100% client-side processing โ€” no uploads, no server transfer, no account required
  • Organized into four categories: For Business (18 tools), Documents (11 tools), Home & Projects (5 tools), and Tech (12 tools)
  • e-Invoicing tools: Peppol BIS 3.0 invoice validator, Factur-X/ZUGFeRD validator & extractor, PDF invoice generator with embedded payment QR, UBL/Peppol invoice viewer
  • IDs & payments tools: IBAN validator, company number validator (BCE/SIREN/SIRET), intracommunity VAT number validator, Belgian structured communication generator, EPC payment QR-code generator
  • Business calculators: VAT calculator (7 EU countries + custom rate), commercial margin calculator, loan/amortisation calculator, Belgian rent indexation calculator, percentage calculator, invoice due date & late-payment interest calculator, business-day calculator, gross/net salary calculators for Belgium and France
  • PDF tools: merge, split/extract pages, compress, convert to images, convert PDF to Word, convert Word to PDF
  • Image tools: resize, compress, format conversion (WebP/JPEG/PNG), EXIF metadata remover, favicon generator
  • Home & everyday calculators: electricity consumption calculator, paint calculator, tiling calculator, rooftop insulation calculator, unit converter
  • Developer tools: JSON formatter/validator, Base64 encoder/decoder, JWT decoder, UUID generator, SHA-256/SHA-512 hash calculator, XML formatter/validator, text diff comparator, regex tester, cron expression parser
  • Misc utilities: word/character counter, password generator, QR-code generator
  • Search-based tool discovery alongside category browsing
  • Regularly updated with new tools added based on client and field needs

A startup from Liege, Belgium that is founded by Giovanni La Mantia.

(0 reviews)
Platforms:
  • Web
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FlexinaTools

FlexinaTools Reviews and Details

This page is designed to help you find out whether FlexinaTools is good and if it is the right choice for you.

#Online Tools #Utilities #Developer Tools #Business Tools #Billing & Invoicing #PDF Tools #Image Tools #Online Calculators

Screenshots and images

  • FlexinaTools Home page โ€” four tool universes
    Home page โ€” four tool universes //
    2026-08-22
  • FlexinaTools Merge PDFs โ€” combine several PDFs
    Merge PDFs โ€” combine several PDFs //
    2026-08-22
  • FlexinaTools Peppol BIS 3.0 invoice validator
    Peppol BIS 3.0 invoice validator //
    2026-08-22
  • FlexinaTools VAT calculator โ€” 7 EU countries + custom rate
    VAT calculator โ€” 7 EU countries + custom rate //
    2026-08-22
  • FlexinaTools For business universe โ€” 18 tools
    For business universe โ€” 18 tools //
    2026-08-22

Features & Specs

  1. 46 free online tools

    PDF, images, e-invoicing, VAT, home projects and developer utilities

  2. 100% browser-based

    All processing happens locally โ€” no account, no upload, nothing leaves your device

  3. No sign-up required

    All 46 tools are free and usable instantly, without an account

  4. Multilingual

    6 languages: English, French, German, Spanish, Portuguese, Dutch

  5. PDF tools

    Merge, split, compress, convert and protect PDFs in the browser

  6. Peppol BIS 3.0 validator

    Validate EU e-invoices against the Peppol BIS 3.0.3 schema and detect non-conformities

  7. VAT calculator

    Gross/net VAT conversion for 7 EU countries plus a custom rate

  8. Developer utilities

    JWT decoder, Base64, JSON and XML formatters, hash generator and password generator

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Questions & Answers

As answered by people managing FlexinaTools.

  1. How would you describe the primary audience of FlexinaTools?

    • Small business owners, accountants and freelancers who deal with e-invoicing (Peppol, VAT, invoice generation) in the EU โ€” especially Belgium, France, the Netherlands, Germany, Spain and Portugal
    • Developers and technical users who need quick utilities: JWT decoding, Base64, JSON/XML formatting, hashing
    • Everyday users who want fast, private PDF and image tools without creating an account
    • Home-project planners who use the calculators (tiling, paint, insulation, mortgage)

  2. What makes FlexinaTools unique?

    FlexinaTools is a privacy-first platform: all 46 tools run 100% in your browser, so your files and data are never uploaded to a server and no account is required. It goes beyond generic PDF utilities to cover niche professional needs โ€” Peppol BIS 3.0 e-invoice validation, VAT calculation for 7 EU countries, IBAN validation โ€” and the whole interface is localized in 6 languages (English, French, German, Spanish, Portuguese, Dutch).

  3. Why should a person choose FlexinaTools over its competitors?

    Most online tool sites charge or rate-limit the same operations. With FlexinaTools, all 46 tools are completely free, with no sign-up, no paywall and no usage limits โ€” because everything runs in your own browser, we simply don't pay for server-side processing. On top of privacy (your invoices, PDFs and images never leave your device), it bundles things competitors don't have: a Peppol BIS 3.0.3 e-invoice validator, a multi-country VAT calculator and a full PDF + image + developer toolkit in one place.

  4. What's the story behind FlexinaTools?

    FlexinaTools was built by Flexina SRL, a software company based in Liรจge, Belgium. It started as a collection of small utilities the team kept using internally โ€” invoice generation, VAT calculations, PDF merging โ€” and it grew when we noticed that people always ask for the same things: a quick tool, no account, and the guarantee that their files never leave their device. The guiding principle became: if the browser can do it, the server should never see it. Today the site groups 46 free tools around four universes โ€” business, documents, home projects and developer โ€” and is localized in 6 European languages.

  5. Which are the primary technologies used for building FlexinaTools?

    • Vue 3 single-page application with vue-router
    • Vite + vite-ssg: every page is statically generated at build time for fast loading and good SEO, in 6 locales
    • Client-side JavaScript libraries: pdf-lib and pdf.js for PDF operations, Aspose for advanced PDF processing, Canvas API for image tools
    • All computation runs in the visitor's browser โ€” the site itself is a static site with no application backend

  6. Who are some of the biggest customers of FlexinaTools?

    • FlexinaTools is a free, self-serve product, so it has no named corporate customers to list
    • Its daily users are individuals, freelancers and small businesses across the EU who validate Peppol e-invoices, merge PDFs or calculate VAT
    • The product is developed and operated by Flexina SRL, a software company based in Liรจge, Belgium

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External links

We have collected here some useful links to help you find out if FlexinaTools is good.

  • Public traffic stats of FlexinaTools

    Check the traffic stats of FlexinaTools on SimilarWeb. The key metrics to look for are: monthly visits, average visit duration, pages per visit, and traffic by country. Moreoever, check the traffic sources. For example "Direct" traffic is a good sign.

  • Domain Rating (DR)

    Check the "Domain Rating" of FlexinaTools on Ahrefs. The domain rating is a measure of the strength of a website's backlink profile on a scale from 0 to 100. It shows the strength of FlexinaTools's backlink profile compared to the other websites. In most cases a domain rating of 60+ is considered good and 70+ is considered very good.

  • Domain Authority (DA)

    Check the "Domain Authority" of FlexinaTools on MOZ. A website's domain authority (DA) is a search engine ranking score that predicts how well a website will rank on search engine result pages (SERPs). It is based on a 100-point logarithmic scale, with higher scores corresponding to a greater likelihood of ranking. This is another useful metric to check if a website is good.

  • Public opinion on Reddit

    The latest comments about FlexinaTools on Reddit. This can help you find out how popualr the product is and what people think about it.

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Is FlexinaTools good? This is an informative page that will help you find out. Moreover, you can review and discuss FlexinaTools here. The primary details have been verified within the last quarter. So they could be considered up to date. If you think we are missing something, please use the means on this page to comment or suggest changes. All reviews and comments are highly encouranged and appreciated as they help everyone in the community to make an informed choice. Please always be kind and objective when evaluating a product and sharing your opinion.

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