How do I merge PDF files online for free without signup?

Go to tools.arkaserve.com/merge-pdf, drag and drop your PDF files, reorder them if needed, and click Merge. Download the combined PDF instantly — completely free with no signup, no watermark, and no email required. Works on mobile too.

How do I compress a PDF to reduce its size below 1MB?

Go to tools.arkaserve.com/compress-pdf, upload your PDF, select High compression, and download the smaller file. Most image-heavy PDFs reduce by 60–85%, easily bringing a 4MB file under 1MB. Free, no signup, no watermark.

How do I convert PDF to Word (DOC/DOCX) for free?

Go to tools.arkaserve.com/pdf-to-word, upload your PDF file, and click Convert. You get an editable Word (.docx) document instantly — completely free with no signup, no email, and no watermark required.

Can I convert PDF to Excel (XLSX) online for free?

Yes. Go to tools.arkaserve.com/pdf-to-excel, upload your PDF, and the tool automatically detects and extracts tables into an editable Excel spreadsheet. Free with no signup or watermark.

How do I convert JPG photos to PDF on my phone for free?

Go to tools.arkaserve.com/jpg-to-pdf in any mobile browser, tap to upload your photos, arrange the pages in order, and download the PDF — all from your phone. No app needed, completely free with no watermark.

Is Arkaserve Tools completely free — no hidden charges?

Yes, all 60+ tools on Arkaserve Tools are completely free with no signup, no watermark, no email required, and no hidden charges. There is no premium tier — every tool is fully free for unlimited use.

Are my files private when I use these PDF tools?

Yes. Files are processed securely and automatically deleted from the server within 1 hour of upload. Several tools (PDF editor, image compressor, HEIC converter, hash generator) process files entirely in your browser — your files never leave your device.

How do I create a QR code for a URL or WhatsApp for free?

Go to tools.arkaserve.com/qr-generator, select URL, WhatsApp, or any other type, enter your content, and download a high-resolution PNG QR code — no signup, no watermark, no expiry date. Free for business, personal, or commercial use.

IP Calculator Online Free -- Subnet & CIDR Calculator

IP Calculator Online Free — Subnet & CIDR CalculatorCalculate subnet masks, CIDR notation, network address, broadcast address, and usable hosts online for free. Free IP address and subnet calculator.How to use IP Calculator — step by step

Enter an IP address with CIDR notation — Type an IP address followed by a slash and prefix length (e.g., 192.168.1.0/24, 10.0.0.0/8, 172.16.0.0/12). Common uses: planning subnets for a home lab or office network, calculating host ranges for AWS VPC configuration, verifying subnet masks in a networking exam, understanding CIDR blocks for firewall rules, or troubleshooting network range conflicts.

See all subnet details instantly — The calculator immediately shows: Network address (first address), Broadcast address (last address), Subnet mask (e.g., 255.255.255.0), Usable host range (first to last usable IP), Total hosts, and Usable hosts. All values update as you type.

Copy any value — Click copy next to any calculated value for use in network configuration, documentation, firewall rules, or cloud infrastructure setup. Completely free, no signup. Supports all IPv4 CIDR prefixes from /0 to /32.

Frequently asked questionsHow do I calculate subnet mask and host range from a CIDR block free?Enter your IP and CIDR prefix at tools.arkaserve.com/ip-calculator (e.g., 192.168.1.0/24) and the calculator instantly shows the network address, broadcast address, subnet mask (255.255.255.0), usable host range (192.168.1.1–192.168.1.254), and usable host count (254). Completely free, no signup. Useful for networking exams, AWS VPC planning, and lab configurations.What is CIDR notation and how do I read it?CIDR (Classless Inter-Domain Routing) notation is IP-address/prefix (e.g., 192.168.1.0/24). The number after the slash is how many bits are the "network part." /24 = 256 total addresses (2^8), /16 = 65,536 addresses (2^16), /8 = 16,777,216 addresses (2^24). Private IPv4 ranges: 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16. The smaller the prefix number, the larger the subnet.How many usable hosts does a /24, /16, or /30 subnet have?Usable hosts = 2^(32-prefix) - 2 (subtract 1 for network address and 1 for broadcast). /30 = 2 usable hosts (used for point-to-point links). /29 = 6. /28 = 14. /27 = 30. /26 = 62. /25 = 126. /24 = 254. /23 = 510. /22 = 1022. /20 = 4094. /16 = 65,534. /8 = 16,777,214. The IP calculator shows the exact count for any prefix.