Free tools for the IT community
Built for the cases I run into daily managing Microsoft 365 and Entra ID. Everything runs in your browser: no data is ever sent to an Infonovice server. The tools themselves are currently available in French.
Email header analyzer
Message path, per-hop delays, SPF/DKIM/DMARC, M365 antispam verdict (SCL/BCL).
● Available 🌐DNS Diagnostic+
MX, SPF, DKIM, DMARC, NS, A/TXT — with recommendations: SPF 10-lookup limit, DMARC policy…
● Available 🔗Safe Links decoder
Recover the original URL behind a link rewritten by Microsoft Defender (safelinks) — without clicking.
● Available 🔑JWT / Token Decoder
OAuth2 / OIDC tokens (Entra ID): claims explained, audience, expiration.
● Available 🎫SAML Decoder
SAMLResponse (Base64/deflate): NameID, attributes, audience, readable XML + capture tutorial.
● Available 🔐Password generator
Length, character sets, inclusions/exclusions, strength indicator (entropy).
● Available 🕵️Compromised password?
Checks a password against known breaches (Have I Been Pwned, k-anonymity).
● Available 🪵Windows EventID
Dictionary of useful Windows events: 4624, 4625, 4740, 7045… with investigation tips.
● Available 🔌Network ports by product
Flows to open: AD/Kerberos/LDAP, RDS, SQL, SMB, NTP, FTP/FTPS, Exchange, Entra Connect — with field notes.
● Available 🧮IP / CIDR calculator
Network, broadcast, host range, mask and wildcard for IPv4.
● Available 🌍IP Info & geolocation
Location, country, provider, ASN of an IP + PowerShell traceroute equivalents.
● Available 💻My device
What your browser reveals: public IP, OS, resolution, GPU, timezone, approximate location.
● Available ⚖️Text compare
Side-by-side diff with highlighting — scripts, exported GPOs, configs.
● Available 📝Text analyzer
Characters, words, sentences, reading time, most frequent words.
● Available 🔤Base64 / URL / Hex
UTF-8 safe encoding and decoding.
● Available 🚦HTTP status codes
All status codes with instant search and descriptions.
● Available ☁️AADSTS errors (Entra ID)
The Entra authentication error dictionary: real cause and fix — 50076, 53003, 700016…
● Available 🔄ImmutableID ↔ ObjectGUID
The Entra Connect hard-match converter, with the PowerShell walkthrough.
● Available ⏱️AD & Unix timestamps
lastLogon, lastLogonTimestamp, pwdLastSet, accountExpires (18-digit FileTime) and epoch ↔ readable dates.
● Available 🪪SID decoder
Breaks down a SID, converts objectSid Base64, identifies well-known SIDs/RIDs (512, 519, krbtgt…).
● Available 🧾M365 license comparator
F3 → E5 and the new E7 (Copilot + Agent 365): the capabilities that matter (Intune, Entra, Defender, Purview, AI) + checkboxes and field advice.
● Available 🗂️GPO Explorer
Knowledge base of the most sensitive GPO settings: side effects and a prod-impact thermometer, from the field.
● Available ⌨️AD commands
repadmin, dcdiag, nltest, dsregcmd cheat sheet… and their PowerShell equivalents, with syntax and use cases.
● Available 📚PDF merge
Combine multiple PDFs into one, reorderable by drag & drop. 100% local.
● Available ✂️PDF split
Split a PDF page by page or by ranges (1-3,4,5-8), export as ZIP or multiple downloads.
● Available 📑Extract PDF pages
Extract specific pages (e.g. 2 and 5) into a new PDF.
● Available 📝Markdown converter
Text, .docx, .html, .txt or .pdf → clean Markdown. Preview, copy and .md download.
● Available 🖼️PDF → JPG
Convert each PDF page to a JPG image (adjustable quality), downloadable one by one.
● Available 📎Images → PDF
Combine JPG/PNG images into a single reorderable PDF, with orientation and margin options.
● Available 📐Unit converter
Length, mass, speed, temperature, volume, area and data — live conversion.
● Available 🔳QR Code generator
Text or URL → QR code: size, error correction L/M/Q/H, colors, PNG and SVG export.
● Available ▐Barcode generator
EAN-13, UPC, Code128, Code39 — live render, PNG and SVG export.
● Available ⁘RegEx tester & helper
Live-highlighted matches, captured groups, g/i/m/s flags and a token cheat sheet.
● Available 🕐World clock
Live time across multiple time zones: date, UTC offset and gap with your local time.
● Available 🪵Windows event log analysis
CSV export from Get-WinEvent: Warning/Error/Critical counts, top EventID + source, timeline, enriched with the dictionary.
● Available 🛂Microsoft Graph permissions
~50 Graph scopes: delegated/application type, real effect, admin consent and a sensitivity meter.
● Available 📜CSR decoder
Paste a PEM CSR: subject (CN/O/OU…), SANs, algorithm, key type/size (RSA/ECC) + best-practice checks.
● Available 🔒SSL certificate decoder
X.509 certificate (PEM or .cer/.der): subject, issuer, validity & expiry, SANs, key, usages, SHA-1/256 fingerprints + checks.
● Available 📬Domain reputation & deliverability
MX, SPF, DKIM, DMARC, MTA-STS, BIMI, DNSSEC of a domain with a deliverability score and recommendations.
● Available💡 Missing a tool? Tell me — the best tools come from real field needs.