IT Tools for Network, Windows, DNS & Security

Practical & Web Tools

QR codes, colours, encodings, YAML, XML and CSV/JSON conversions.

Base64 encoder and decoder Encode or decode UTF-8 text in Base64 directly in your browser. Color Picker: HEX and RGB from an image Import an image and select a pixel with the pipette to instantly get its HEX, RGB and HSL color. Cron Expression Generator Build a standard five-field cron expression and get a readable explanation. CSV ↔ JSON Converter Convert CSV tables to JSON and tabular JSON to CSV locally. URL Encoder and Decoder Encode or decode a full URL or URL component using standard percent-encoding. JSON Formatter & Validator Validate, pretty-print, and minify JSON locally in your browser. JWT Decoder Decode JWT headers and payloads locally without sending the token to the server. Linux Permissions (chmod) Converter Convert Linux permissions between octal and symbolic notation and generate the chmod command. MD5, SHA-1, SHA-256 and SHA-512 Hash Generator Calculate MD5, SHA-1, SHA-256, SHA-384 or SHA-512 hashes locally in your browser. QR Code Generator Create a QR Code from a URL, text or Wi-Fi network and download it in PNG or SVG... Regular Expression (Regex) Test Test a regular expression against text and inspect matches in your browser. Secure password generator Generate random passwords locally based on the length and character sets of your choice. Semantic Version Comparator Compare two Semantic Versioning values, including pre-release identifiers, with no external dependency. Unix Timestamp / Date Converter Convert a Unix timestamp to a readable date, or convert a date to a timestamp in seconds or milliseconds. UUID / GUID v4 Generator Generate one or more random UUUUUUID/GUID version 4 values locally in your browser. XML Formatter & Validator Validate, indent or minify XML without sending its content to the server. YAML Formatter & Validator Validate, normalize and format YAML directly in your browser. Binary, Decimal, Hex & Octal Converter Convert integers locally between binary, octal, decimal and hexadecimal bases. Data Unit Converter Convert bits, bytes, KB, MB, GB, TB and binary units KiB, MiB, GiB and TiB.

PDF & Documents

Compress, convert, merge, split, rotate, reorder, delete and extract PDF pages.

AI Text and Document Cleaner Inspect and clean invisible characters, labels and metadata. Local previews and reports. Add Page Numbers to PDF Add configurable page numbering to your PDF directly in your browser. Add PDF Watermark Add a custom text watermark to every PDF page without uploading the document to a server. Compress PDF and Files Online Reduce PDF, image, Word, Excel, PowerPoint, and text file sizes without an external API. Crop PDF Crop the visible margins of all PDF pages by setting millimetre offsets. Delete PDF Pages Delete one or more pages from a PDF while keeping the remaining pages intact. Digitally Sign a PDF Cryptographically sign a PDF with your PKCS#12 certificate (.p12/.pfx) without uploading the document or private key to BAOI. Extract Images from a PDF Extract raster images embedded in a PDF and download them as a ZIP archive of PNG files. Extract PDF Pages Create a new PDF containing only the pages selected from an existing document. Images to PDF Combine JPG or PNG images into a single PDF directly in your browser. Merge PDF Combine multiple PDF files in your chosen order directly in your browser. OCR PDF: Make a Scanned PDF Searchable Recognize text in a scanned PDF and add a searchable text layer directly in your browser. Overlay Two PDFs Overlay a second PDF on the main document page by page or by repeating its first page, with adjustable opacity. Password Protect a PDF Encrypt a PDF with AES-256 and an opening password directly in your browser. PDF Converter to Word, Excel, PowerPoint, Images and Text Convert PDF to Word, Excel, PowerPoint, PNG, JPG or text directly in your browser. Put Multiple PDF Pages on One Sheet Arrange 2, 4, 6 or 9 PDF pages on one A4 or Letter sheet for printing or archiving. Reorder PDF Pages Change the order of PDF pages by specifying the exact new page order. Resize PDF Pages Convert every page of a PDF to A4, A3, Letter, Legal or a custom size while scaling the page content. Rotate PDF Rotate all pages or only selected pages in your PDF. Split PDF Split a PDF into multiple files by pages or page groups.

Networking & infrastructure

IPv4, VLANs, traffic flows, IPAM, network topologies and monitoring.

IPv4 Range to CIDR Converter Convert an IPv4 start/end range into the smallest possible list of CIDR blocks. IPv4 Subnet Calculator Calculate the network address, subnet mask, broadcast address and host range from an IPv4 address and CIDR prefix. IPv4 VLSM Calculator Split an IPv4 network into variable-size subnets based on host requirements. IPv6 Subnet Calculator Calculate the network address, prefix, and range of an IPv6 subnet. IT Monitoring Center Build a monitoring plan with thresholds, criticality, alerting and coverage. Lightweight IPAM Inventory IP addresses, hostnames, VLANs, MAC addresses and DHCP reservations with duplicate detection. MTU / MSS Calculator Calculate a suitable TCP MSS from MTU, IP family, and optional tunnel overhead. Network & VLAN Planner Plan IPv4 networks, VLANs and DHCP ranges, detect overlaps and export the result. Network flow matrix Interactive BAOI tool available directly in your browser. Network scheme Interactive BAOI tool available directly in your browser. PoE Budget Calculator Check whether a switch PoE budget can power a set of devices. MAC / OUI Vendor Lookup & Format Converter Normalize a MAC address, extract its OUI and look up the vendor locally in an imported CSV registry. RJ45 Wiring Diagram T568A / T568B View the eight RJ45 conductor positions for T568A and T568B and compare straight-through and crossover wiring. 2.4 / 5 GHz Wi-Fi Channel Planner Add access points, visualize channel overlap and get simple channel-distribution suggestions for 2.4 and 5 GHz Wi-Fi.

Analysis & Security

DNS, HTTP, email headers, SPF, DMARC, DKIM and technical checks.

Analysis of email headers Interactive BAOI tool available directly in your browser. DMARC Record Generator Create a DMARC TXT record to monitor and protect your domain against email spoofing. DKIM DNS Record Builder Build a DKIM TXT record from a selector, domain and public key. DNS & Domain Analysis Interactive BAOI tool available directly in your browser. HTTP & web security analysis Interactive BAOI tool available directly in your browser. SPF Record Generator Build an SPF record from IPv4, IPv6, include mechanisms, and a final policy. One-Time Secret Encrypt sensitive information in your browser and share it with a one-time link. SSL / TLS Certificate Checker Check expiry, subject, issuer, SANs, SHA-256 fingerprint and certificate chain information for a public TLS endpoint. OpenSSL CSR / Self-Signed Certificate Generator Generate an OpenSSL configuration and commands for creating a private key, CSR and SAN-enabled self-signed certificate locally. RBL / DNSBL IP & Domain Checker Query Spamhaus ZEN for a public IPv4 address or Spamhaus DBL for a domain while separating reputation results from DNSBL error codes.

IT Generators

Robocopy, PowerShell, IT commands and firewall rules.

Calculators

Sizing, storage, transfer, SLA and IT migration calculators.

IT Migration Calculator Interactive BAOI tool available directly in your browser. Data Transfer Time Calculator Estimate how long a data transfer will take from its size and available bandwidth. Data Storage Unit Converter Convert bytes, KB, MB, GB, TB and binary KiB, MiB, GiB and TiB units. RAID Capacity Calculator Calculate approximate usable capacity for RAID 0, 1, 5, 6 or 10. Backup Storage Calculator Estimate the storage required for a backup strategy and retention period. SLA Availability Calculator Convert an SLA percentage into maximum allowed downtime. Log Storage Calculator Estimate storage needed for logs from daily volume and retention. VM Sizing Calculator Estimate resources required for a virtual machine estate. Binary, Decimal and Hex Converter Convert numbers between binary, decimal, hexadecimal and octal. Bandwidth per User Calculator Divide available bandwidth across users or endpoints. Backup Throughput Calculator Calculate the minimum throughput required to finish a backup within a target window. UPS Sizing Calculator Estimate recommended VA rating and battery Wh from load, target runtime, power factor and efficiency.

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