Network
Bandwidth & Download Time Calculator: Mbps to MB/s Converter
Understanding the difference between megabits per second (Mbps, advertised by internet service providers) and megabytes per second (MB/s,…
100% Client-Side • Instant • No Watermarks
Interactive Online Tools & Utilities
Explore our suite of client-side web tools for freelancers, developers, accountants, and network engineers. Zero tracking, zero server storage, and zero signups required.
⭐ Featured Master Suites
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Master Suite
Developer & Cryptography Suite
JSON formatters, Base64 converters, JWT analyzers, URL encoders, and hash generators. 100% private in-browser computation.
Open Developer Suite
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Master Suite
Financial & Wealth Toolkit
PPF calculation, CAGR, compound interest, SIP growth, and loan EMI schedules with interactive charts.
Open Finance Suite
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Master Suite
Network Telemetry Suite
Live traceroute maps, DNS propagation inspection, SSL certificate analyzers, simulated port checks, and bandwidth estimators.
Open Network Suite
Developer
Base64 Encode & Decode: Instant Online String Converter
Base64 encoding is widely used across API authentications, JWT payloads, email MIME attachments, and inline image data URIs.…
Health
BMI Calculator: Body Mass Index & Healthy Weight Range
Body Mass Index (BMI) is a globally recognized biometric indicator used by the World Health Organization (WHO) to…
Utility
Chronological Age Calculator: Exact Years, Months, Days & Hours
Need to verify your exact chronological age for official government filings, competitive examinations, medical forms, or insurance applications?…
Featured
Popular
Color Palette Studio — Free Spacebar Generator, UI Visualizer & Contrast Matrix
Creating cohesive, accessible color palettes has long been hampered by intrusive paywalls and limitations. Many online palette tools…
Featured
Speed
Compress PDF Online — Reduce PDF File Size Free
Shrink heavy PDF files by up to 80% without visible loss in reading quality. Perfect for email attachments…
Network
DNS Lookup & Propagation Checker: A, MX, TXT & NS Records
Diagnose domain name resolution, verify Google Workspace or Microsoft 365 mail exchange (MX) records, and audit SPF/DKIM TXT…
Network
Domain WHOIS & RDAP Lookup: Check Registrar & Expiry Date
Query authoritative domain registry databases to inspect domain creation history, registration expiry dates, active nameservers, and accredited registrar…
Finance
EMI Loan Calculator: Compare Home, Car & Personal Loan Repayments
Before committing to a long-term mortgage, automobile financing, or personal loan, calculating your exact monthly repayment obligation is…
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Popular
Free Invoice Generator: Create & Download PDF Invoices
Professional Invoicing Made Simple, Private, and Instant The 99tools Free Online Invoice Generator is an interactive, browser-based billing…
Featured
Flagship
Free Online Diagram Maker & Flowchart Studio
Creating software architecture diagrams, system schematics, flowcharts, and technical wireframes online has long been complicated by commercial subscriptions,…
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Flagship
Free PDF Editor — Edit Text, Erase, Form Filler & eSignature
Handling PDF documents online has notoriously been plagued by aggressive paywalls, mandatory subscriptions, and severe privacy hazards. Legacy…
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Popular
Free PDF Signer — Legal eSignature & Initials Studio
Execute NDAs, agreements, and contracts securely. 99tools PDF Signer provides high-precision Bézier signature drawing and cursive typography with…
ATS Optimized
Free Resume Builder: ATS-Friendly Professional CV Maker
Create ATS-Compliant, Job-Winning Resumes in Minutes The 99tools Free Online Resume Builder is an interactive, browser-based CV designer…
Networking
Free Subnet Calculator: IPv4 CIDR, Netmask & Host Range
Subnetting is the foundation of modern TCP/IP networking, cloud VPC routing, and network segmentation. Calculating IP masks, CIDR…
Developer
HTTP Header Checker: Audit Response Headers & Security Status
Inspect server response codes (200, 301, 302, 404, 500), evaluate HTTP Strict Transport Security (HSTS), Content-Security-Policy (CSP), and…
Finance
Income Tax Calculator FY 2025-26: Old vs New Regime Comparison
Navigating the differences between the Old Tax Regime and the revised New Tax Regime (Section 115BAC) requires comparing…
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Popular
Merge PDF Files Online — Combine Multiple PDFs Free
Combine contracts, invoices, and reports into a single organized document. Merge multiple PDFs in seconds with our high-speed…
Network
My IP Address Finder: Public IPv4, IPv6 & Geo-Location
Identify your device’s external public internet protocol address, internet service provider (ISP), and autonomous network routing data in…
Security
Network Port Scanner: Audit Common Ports & Socket Services
Auditing open TCP socket ports helps network administrators identify exposed services, misconfigured firewalls, and server security vulnerabilities. 99tools…
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Security
Password Protect PDF — Add 256-bit AES Encryption Free
Encrypt confidential financial statements, legal records, and tax documents with strong AES passwords directly inside your browser memory.
Featured
Utility
Split PDF Pages Online — Extract Pages Free
Extract specific pages or break a multi-page PDF into standalone documents with complete confidentiality and zero server data…
Security
SSL Certificate Checker: Verify Expiration Date & TLS Chain
An expired SSL/TLS certificate triggers severe browser security warnings, destroying organic visitor trust. 99tools SSL Certificate Checker tests…
Network
Traceroute Visualizer: Map Packet Route & Router Hops
Packet latency and connection drops often occur at intermediate autonomous network hops between your device and the destination…
Developer
User Agent Checker: Browser Signature & Device Inspector
Every HTTP request sends a User-Agent header specifying the client browser version, rendering engine, and operating system architecture.…
Engineered for Absolute Speed & Privacy
Why millions of professionals rely on 99tools browser-based utilities every month.
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100% Client-Side Execution
Your invoices, calculations, passwords, and sensitive keys never touch external servers. Everything runs entirely inside your browser sandbox.
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Zero Latency & No Signups
No paywalls, no credit cards, and no account creation. Open the tool, get the job done in seconds, and export your files watermark-free.
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Print & Vector Ready
Export high-resolution vector PDFs, standard JSON configurations, or verified network reports ready for corporate audits.