Guides
In-depth guides on image formats, compression, audio, PDF, and developer tools.
Image Tools
10 guidesThe Complete Image Format Guide: Which Format Should You Use?
JPEG, PNG, WebP, AVIF, GIF, SVG — every format explained. Real file-size comparisons, a browser support table, and a decision matrix. Pick the right format every time.
JPEG vs PNG: Which Format Should You Choose?
JPEG vs PNG compared clearly — transparency, file size, quality loss, and a decision flowchart for photos, logos, screenshots, and web graphics.
How to Compress Images Without Losing Quality
Exact quality settings for JPEG, PNG, and WebP compression. Which numbers to use, when to resize instead, and a free browser-based compressor — no uploads.
What is WebP Format and Why Should You Use It?
WebP explained: how it achieves 25-35% smaller files than JPEG, which browsers support it, and when you should (and shouldn't) switch.
How to Convert HEIC Photos to JPEG (And Why iPhone Uses HEIC)
Why iPhone saves photos as HEIC, why Windows can't open them, and how to convert them to JPEG on any device for free — no software required.
How to Remove Image Backgrounds for Free
Remove backgrounds from product photos, portraits, and logos in seconds. AI-powered, browser-based — your images are never uploaded to any server.
TinyPNG vs LevnTools — An Honest Image Compression Comparison
TinyPNG is excellent for PNG compression. This honest comparison covers where TinyPNG wins, where it falls short (5MB limit, upload privacy, JPEG handling), and what to use instead.
remove.bg vs LevnTools — Background Removal Without the Credit System
remove.bg is the quality benchmark for AI background removal. This honest comparison covers where its edge detection is superior, where the credit system is limiting, and free unlimited alternatives.
Best Free Image Compressor — Which Tool Wins for Each Image Type
TinyPNG, Squoosh, iLoveIMG, and LevnTools compared honestly. Which wins for JPEG photos, PNG graphics, logos, gradients, and large camera files — and why the image type matters more than the tool.
Best Free Background Remover — Which Tool Handles Each Subject Type
remove.bg, Canva, Pixlr, and LevnTools background removal compared honestly. Which tool handles complex hair, products, transparent objects, and white-on-white subjects — and why.
PDF Tools
8 guidesThe Complete PDF Guide
Everything you need to know about PDFs: how they work, how to compress, merge, split, convert, and protect them. Free tools, no software required.
How to Compress a PDF Without Losing Quality
Step-by-step guide to compressing PDFs for email, web, and print. Learn what makes PDFs large and which settings to use for each use case.
PDF vs Word: Which Format Should You Use?
PDF and Word serve different purposes. This guide explains when to use each format, when to convert between them, and the limitations of each.
How to Merge and Split PDF Files
Step-by-step guide to merging multiple PDFs into one and splitting a PDF into parts. Covers page ordering, extraction, and common workflow patterns.
How to Secure Your PDF Files
Complete guide to PDF security: adding and removing passwords, setting permissions, redacting sensitive content, and understanding what each protection actually does.
iLovePDF vs LevnTools — An Honest Comparison
Comparing iLovePDF and LevnTools for PDF tasks. Where each is genuinely better, file privacy differences, free tier limits, and which to choose for different use cases.
Smallpdf vs LevnTools — Where Each Tool Actually Wins
Honest comparison of Smallpdf and LevnTools for PDF tasks in 2025. Smallpdf's UX and integrations vs browser-only processing with no upload and no free tier limits.
Best Free PDF Compressor — Compared Across 5 Document Types
Not all PDF compressors work equally on every document type. Scanned PDFs, Word exports, design PDFs, and image catalogues compress differently. A practical guide to picking the right tool.
Audio Tools
7 guidesMP3 vs WAV vs FLAC vs AAC: Complete Audio Format Guide
MP3, WAV, FLAC, AAC, OGG — every audio format explained. Real file-size comparisons, bitrate recommendations, and a format picker for every use case. Free tools, no download.
How to Edit Audio Online Without Installing Any Software
Trim, merge, speed-change, normalize, and remove silence from audio files directly in your browser. Step-by-step guide. Free, no software required.
How to Edit a Podcast Online: Complete Workflow Guide
Edit your podcast in the browser: silence removal, noise reduction tips, loudness normalization to −16 LUFS, multi-segment merging, and export for Spotify, Apple, and RSS. Free.
How to Remove Background Noise from Audio Online
Remove background noise from voice recordings, podcasts, and videos online. Free EQ methods for hum, AI removal for broadband noise. Step-by-step guide.
Audio Normalization: LUFS, dBFS, and Streaming Platform Standards Explained
LUFS vs dBFS, peak vs loudness normalization, and the exact targets for Spotify, Apple Music, YouTube, and podcasts. Clear explanation with no jargon.
Best Free Audacity Alternatives Online — No Download Required
Compare browser-based Audacity alternatives for trimming, editing, normalizing, and converting audio. Free, no installation. Which tool is right for your workflow?
Best Free Online Audio Converter: MP3, WAV, FLAC, and AAC Compared
Compare free online audio converters on format support, privacy, speed, and quality. Which browser-based tool is best for MP3, WAV, FLAC, and AAC conversion in 2026?
Developer Tools
5 guidesJSON Complete Guide: Syntax, Validation, and Real-World Use
JSON format rules, syntax gotchas, validation techniques, schema definitions, and conversion patterns — with examples. All tools run in your browser.
Base64 Encoding: How It Works, Why It Exists, and When to Use It
Base64 explained: the encoding algorithm, alphabet, URL-safe variant, padding rules, and the right (and wrong) use cases. With examples and a free in-browser encoder.
JWT Authentication Explained: Structure, Claims, Algorithms, and Security Pitfalls
JWT structure demystified: header, payload, signature. Claims, algorithms (HS256 vs RS256), expiration, refresh tokens, and the security mistakes that get apps breached.
Best Free Online Developer Tools in 2026 — Instant, Browser-Based, No Setup
The best free online developer tools for JSON, Base64, regex, JWT, hashing, UUID, and more — compared by speed, privacy, and features. All run in your browser.
Color Tools
5 guidesCSS Color Formats: Hex, RGB, HSL, OKLCH — Complete Reference
Every CSS color format explained: hex, RGB, HSL, HSB, OKLCH, CMYK, and named colors. When to use each, how to convert between them, and browser support.
WCAG Color Contrast Ratios Explained: AA, AAA, Testing & Fixing
WCAG 2.1 AA and AAA contrast requirements explained. How contrast ratio is calculated, how to test it, and how to fix failures without breaking your design.
Build a Color Palette from Scratch: Tokens, Scales, and Semantics
Step-by-step guide to building a design system color palette. Covers base scale generation, semantic tokens, dark mode mapping, and WCAG compliance.
Color Theory in Web Design: Schemes, Psychology, and Practical Application
Color theory for web designers: the color wheel, complementary, analogous, and triadic schemes, color psychology, and applying theory to UI design.
Coolors Alternatives 2025: Free Color Palette Tools Side-by-Side
Looking for a Coolors alternative? Compare the best free palette generators, contrast checkers, and color scheme tools in 2025 — no signup required.
SEO Tools
5 guidesEvery SEO Meta Tag Explained — What to Write, What to Skip, and Why It Matters
Complete guide to SEO meta tags in 2025. Title tags, meta descriptions, Open Graph, Twitter Cards, canonical, robots — what each does and how to write them.
How to Add Schema Markup and Get Rich Snippets in Google Search
Step-by-step guide to JSON-LD schema markup. Learn which schema types get rich results, how to write them, and how to validate before publishing.
How to Configure Robots.txt and XML Sitemaps for Maximum SEO Crawl Efficiency
Step-by-step guide to robots.txt and XML sitemaps. Configure crawl rules, block AI bots, generate sitemaps, and submit to Google Search Console.
The Complete Technical SEO Checklist: Every Check That Matters in 2025
30-point technical SEO checklist for 2025. Crawlability, indexing, Core Web Vitals, schema, redirects, mobile, structured data — check everything.
Yoast SEO Alternatives in 2025: Free Tools That Do Everything Yoast Does
Compare the best free alternatives to Yoast SEO. Meta tags, sitemap, schema, SERP preview, readability, keyword density — all covered without the plugin.
QR Tools
5 guidesQR Codes — How They Work, When to Use Them, and How to Make Them
Everything you need to know about QR codes: how they work, the different types, error correction levels, best practices, and when to use static vs dynamic.
12 Business QR Code Use Cases (and How to Implement Each One)
Practical guide to using QR codes in your business: menus, business cards, marketing, WiFi, events, packaging. What works and what to avoid.
QR Code Best Practices — Size, Color, Placement, and Testing
QR code best practices: minimum sizes, contrast rules, quiet zone requirements, error correction levels, and how to test before printing.
How to Scan a QR Code — iPhone, Android, Desktop, and From Images
How to scan QR codes on iPhone, Android, Mac, Windows, and from image files. Includes troubleshooting for codes that won't scan and privacy guidance.
QR Code Generator Alternatives — What the Paid Services Offer and What You Don't Need
Comparing QR Monkey, QR Code Generator, Bitly, and browser-based generators. What paid services genuinely provide vs what static QR codes handle for free.
Time Tools
5 guidesThe Pomodoro Technique — How It Works, Why It Works, and How to Apply It
The complete guide to the Pomodoro Technique: the 25-minute work interval method, the science behind it, how to adapt it, and how to handle interruptions.
Time Zones Explained — UTC, GMT, DST, and Half-Hour Offsets
Clear explanation of UTC, GMT, EST vs EDT, DST transitions, half-hour offsets, and how to convert times correctly. Practical guide for remote workers.
Remote Team Meeting Scheduling — Finding the Best Time When There Is No Good Time
How to schedule remote team meetings across time zones: finding overlap windows, rotating inconvenience fairly, and knowing when async beats synchronous.
Date Calculations — Days Between Dates, Age Calculation, and Week Numbers
How to calculate days between dates, exact age from birthdate, business days, ISO week numbers, and date arithmetic edge cases. Clear, practical guide.
Online Timers Compared — Stopwatch, Countdown, and Pomodoro Tools
Comparing the best free online timers: countdown timers, stopwatches, and Pomodoro timers. What timer.guru, e.ggtimer, and browser-based tools each offer.