Tech & Internet

Calculate width, height, and simplified aspect ratios for images, videos, screens, and responsive designs.

Generate responsive image candidate widths, srcset strings, sizes attributes, and img markup.

Encode text to Base64 or decode Base64 to readable text instantly.

Generate responsive CSS clamp() values for fluid typography, spacing, and layouts.

Pick colours and convert between HEX, RGB, RGBA, HSL, and HSV formats.

Generate colour harmonies, tints, shades, and CSS token suggestions from one HEX colour.

Check foreground and background colour contrast ratios against WCAG AA and AAA thresholds.

Calculate flexbox item widths, gaps, container widths, and generate CSS flex layouts.

Calculate CSS grid columns, gaps, container widths, and generate grid-template-columns CSS.

Encode text to HTML entities or decode HTML entities to readable text instantly.

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text.

Calculate SHA file hashes and checksums locally in your browser.

Check IPv4, IPv6, public, private, and network details for an IP address.

Format, validate, beautify, and minify JSON data online.

Validate JSON against common schema rules including type, required fields, properties, arrays, enums, and ranges.

Convert rem to pixels and pixels to rem using any CSS root font size.

Generate random strings, token-like values, IDs, placeholders, and test data.

Test regular expressions online, highlight matches, and inspect capture groups.

Convert text to uppercase, lowercase, title case, camelCase, snake_case, and more.

Build single or bulk QR payloads with URL, text, email, phone, SMS, vCard, color, and quiet-zone planning options.

Encode text for URLs or decode URL-encoded text instantly.

Parse URLs into protocol, host, path, query strings, parameters, and fragments.

Generate random UUIDs and GUIDs instantly for databases, APIs, and testing.

Convert Unix timestamps to dates and dates to Unix timestamps instantly.

Parse browser user agent strings to identify browser, OS, device, and engine details.

Convert vw, vh, vmin, and vmax units into pixels from screen dimensions.

Count words, characters, sentences, paragraphs, and reading time instantly.

Estimate the cost of using APIs based on request volume, pricing tiers, and usage patterns.

Estimate API cost from free allowances, tiered usage bands, minimum spend, platform fees, discounts, and buffers.

Estimate how server or infrastructure costs scale as your user base grows.

Estimate cloud infrastructure costs based on compute usage, storage, bandwidth, and managed services.

Estimate required service instances, peak load, headroom, utilisation, and rough monthly capacity cost.

Estimate logs, metrics, traces, retention, alerting, and observability seat costs from manual rates.

Estimate database instance, replica, storage, backup, IOPS, pooling, monitoring, and support costs.

Estimate file sizes, storage needs, and data transfer requirements.

Estimate video file size from bitrate and duration, or required bitrate for a target file size.

Estimate how long a file download or upload may take based on size and connection speed.

Estimate bandwidth, transfer speed, and connection needs for browsing, work, and streaming.

Score real-time connection quality from entered ping, jitter, packet loss, and ping spread values.

Convert values between binary, decimal, and hexadecimal with optional bit-width context.

Calculate IPv4 CIDR subnet details including network address, usable range, broadcast address, mask, and host count.

Estimate usable storage for RAID 0, 1, 5, 6, 10, and JBOD after spares and filesystem overhead.