Free Online Tools for Tech
Fast, accurate and privacy-friendly tools for hardware, networking, storage, security, images, files and gaming. Zero telemetry, zero registration.
64 Free Tools across 12 categories
Categories
Core Technology
Hardware
3 toolsCalculators for power supply sizing, electrical cost estimations, and system balance analysis.
Networking
5 toolsSubnet, CIDR, IP range, and IPv4/IPv6 notation tools for systems and network engineers.
Storage
1 toolsTools to calculate filesystem capacity, sector sizing, and drive manufacturing discrepancies.
Security
5 toolsCryptographic generators, hash digest creators, and encoders running strictly client-side.
Gaming
5 toolsPrecise mouse sensitivity, eDPI, display frame time, and field-of-view conversion tools.
Conversions & Media
Converters
12 toolsExact digital storage and transmission rate conversions using decimal and binary standards.
Video
4 toolsBitrate calculators, transmission speed estimations, and digital media container size predictors.
Image Tools
10 toolsCompress, resize, crop, convert, compare, and clean image files locally in your browser.
Creator Tools
3 toolsPrepare images and subtitles for social platforms and publishing workflows.
Development, Text & Files
Recently Added
Font Tester
Professional online typography tool with 120+ fonts across 8 categories to test, preview, compare side-by-side, and customize typography in real-time with responsive controls, color palettes, and CSS or image export.
Image Compressor
Reduce image file size in your browser with adjustable quality, format, and a download-ready preview.
Image Resizer
Set exact image dimensions with a ratio lock and export a resized copy without uploading your image.
Image Cropper
Select a crop area with pointer or touch input, choose a ratio, and download the cropped image.
Image Pixelator
Paint over sensitive regions with adjustable pixelation. Pointer and touch input are supported and the source stays local.
Image Blur Tool
Apply a reversible blur brush to selected regions of a photo using mouse, touch, or stylus input.
Popular Utilities
PSU Calculator
Estimate total system wattage and find the optimal Power Supply Unit (PSU) rating for stability.
Storage Capacity Calculator
Compute storage capacity across decimal (1000) and binary (1024) formats to understand actual usable space.
IPv4 Subnet Calculator
Bitwise IPv4 subnetting calculations with full network, broadcast, wildcard, and binary breakdowns.
Data Storage Converter
Comprehensive multi-unit data storage converter covering 12 standard SI decimal and IEC binary units with simultaneous real-time conversion.
Mbps to MB/s Converter
Convert network bandwidth (Mbps) to operating system file download rates (MB/s).
Secure Password Generator
Generate cryptographically secure passwords locally via crypto.getRandomValues() with accurate real-time entropy scoring and zero server transmissions.
UUID Generator (v4 & v7)
Generate random UUID v4 and time-ordered UUID v7 identifiers locally using native browser crypto primitives with bulk and case options.
eDPI Calculator
Calculate your effective sensitivity (eDPI) by combining mouse DPI with in-game sensitivity.
Video File Size & Bitrate Calculator
Comprehensive video calculator: estimate file sizes from bitrates, compute bitrates for upload file size targets, and calculate transfer times.
Download Time Calculator
Calculate accurate download times for any file size based on effective network bandwidth.
Font Tester
Professional online typography tool with 120+ fonts across 8 categories to test, preview, compare side-by-side, and customize typography in real-time with responsive controls, color palettes, and CSS or image export.
Image Compressor
Reduce image file size in your browser with adjustable quality, format, and a download-ready preview.
Image Resizer
Set exact image dimensions with a ratio lock and export a resized copy without uploading your image.
Image Format Converter
Convert common raster images locally to JPG, PNG, or WebP and download the new format.
File Hash & Checksum Generator
Generate cryptographic checksums (SHA-256, SHA-384, SHA-512, SHA-1, MD5) and verify file integrity by comparing expected vendor hashes locally.
File Analyzer / File Information
Comprehensive browser-native file analyzer to inspect MIME types, dimensions, media streams, character counts, and cryptographic hashes without server uploads.
CSV to JSON Converter
Convert tabular data between CSV and JSON with quoted-field handling, validation, copy, and download.
JSON Formatter & Validator
Professional developer utility to format, validate, and minify JSON with precise line/column syntax error detection and payload size statistics.
SRT and VTT Converter
Convert subtitle timing files between SRT and WebVTT while preserving cues and text.
Regex Tester & Debugger
Experiment with regular expressions, inspect every matched occurrence and named capture group, and test replacements with zero server transmission.
JWT Decoder
Read a JSON Web Token header and payload locally. Decoding does not verify the signature.
Color Converter
Inspect and convert colors across all major web and print formats (HEX, RGB, RGBA, HSL, HSLA, HSV, CMYK) in real time with interactive preview.
Social Media Image Resizer
Resize and crop images to exact dimensions for Instagram, TikTok, YouTube, X, Facebook, LinkedIn, Pinterest, and Twitch locally in your browser.
Engineered for Client-Side Accuracy & Privacy
Deterministic Engines
Every calculation is backed by documented IEEE, IETF, or hardware engineering standards.
Local Browser Execution
Cryptographic keys, hashes, network topologies, and electrical inputs never leave your computer.
Zero Overhead
Lightweight, responsive layouts without heavy wrappers ensure immediate calculation speed.