5 min read
How to Preview HTML Online: Live Rendering While You Code
How online HTML preview works: sandboxed iframes render your markup in milliseconds, with security notes, honest limits, and step-by-step playground usage.
AAbhay Khant
Tag Archive
#developer-tools
100 posts found with this tag.
6 min read
Local LLM vs API: Costs, Privacy, and When Each Wins
Local LLM vs API compared: measured model sizes from 2 GB up, privacy tradeoffs, honest crossover math ($22.50/month test case), and which side fits you.
AAbhay Khant
5 min read
Base64 vs Base62: Which Encoding to Use Where
Base64 vs base62 compared with real measurements: one 128-bit value at 21 vs 22 characters, alphabet and URL-safety differences, and which fits each job.
AAbhay Khant
5 min read
How to Decode a JWT Token Online (Safely, Step by Step)
Decode any JWT online in five steps: split segments, read header and payload, convert exp timestamps, spot five-segment JWE tokens, and stay safe debugging.
AAbhay Khant
10 min read
Best AI Coding Assistants in 2026: Which One for Which Job
Claude Code leads 2026 adoption at 39%. Our comparison covers pricing, the OpenCode open-source route, and which assistant fits which job.
AAbhay Khant
5 min read
What Is JSON Schema? Complete Guide With Examples
JSON Schema explained: validation keywords like type and required, format caveats, code generation, and 8,400 validations per second measured locally.
AAbhay Khant
5 min read
YAML vs JSON: Differences and When to Use Each
YAML vs JSON compared: syntax, comments, anchors, the Norway problem, a measured 280x parse-speed gap, and where each format wins in real projects.
AAbhay Khant
7 min read
Best Free Online Tools by Task: 2026 Utilities Guide
The best free online tools organized into 6 task categories: text, developer, image, QR, security, everyday. Browser-based with no uploads or accounts.
AAbhay Khant
7 min read
Wappalyzer Alternatives in 2026: Free and Paid Options
Compare 5 Wappalyzer alternatives: WhatRuns, BuiltWith, PublicWWW, open-source libraries, and free manual checks, compared by accuracy, cost, and best fit.
AAbhay Khant
8 min read
How to Detect Website Technology: The Complete Workflow
Learn how to detect website technology step by step: HTTP headers, page source, cookies, DNS, and certificates. A manual-first workflow anyone can follow.
AAbhay Khant
7 min read
How to Convert Image to Text Free (OCR in Your Browser)
Convert image to text free with browser-based OCR. Extract text from screenshots, scans, and photos without uploading files. Preprocessing tips included.
AAbhay Khant
12 min read
Free Online Image Tools: The Complete 2026 Guide
Free online image tools guide: compress, resize, convert formats, OCR text, check metadata. Browser-based with no uploads. WebP now runs on 21.5% of websites.
AAbhay Khant
7 min read
Regex Cheat Sheet 2026: Quick Reference
Complete regex reference with 12 tables, 40+ patterns, browser support data (Baseline 2023), JS examples, and visual debugging tools included.
AAbhay Khant
10 min read
Best Free Developer Tools 2026: No Install, No Signup
Best free developer tools for 2026: 90+ browser-native utilities for JSON, regex, encoding, JWT, and CSS. No install, no signup, nothing uploaded.
AAbhay Khant
10 min read
Best JSONFormatter Alternative: Private JSON Tools
Looking for a JSONFormatter alternative? ToolSura's JSON tools run 100% in your browser: no upload, no account, no ads. Format, validate, and diff safely.
AAbhay Khant
11 min read
CodeBeautify Alternative: Free Tools, No Ads or Signup
Looking for a CodeBeautify alternative? ToolSura's 90+ dev tools run 100% in your browser: no ads, no signup, no 1 MB limits. Format, minify, diff safely.
AAbhay Khant
11 min read
Regex101 Alternative: Private In-Browser Testing
Need a regex101 alternative? ToolSura's regex tester runs 100% in your browser. No upload, no account, no ads. Test sensitive patterns safely.
AAbhay Khant
11 min read
Online Tools Alternative: Free Browser-Based Tools in 2026
Looking for an online tools alternative? ToolSura offers 90+ free, ad-free utilities that run 100% in your browser, with no signup, no limits, no uploads.
AAbhay Khant
10 min read
How to Minify JavaScript and CSS: A Practical Guide
Learn how to minify JavaScript and CSS. Median mobile pages shipped 558 KB of JS in 2024. Cut bytes with Terser, Lightning CSS, and online tools.
AAbhay Khant
9 min read
PKCE Generator: Create Verifier and Challenge Pairs
Generate PKCE code verifier and S256 challenge pairs in your browser. RFC 7636 compliant lengths, CSPRNG randomness, no signup, nothing transmitted.
AAbhay Khant
10 min read
TypeScript Type Safety: A Practical Guide
TypeScript strict mode catches real bugs before they ship. Learn strictNullChecks, unknown vs any, narrowing, and runtime validation with Zod.
AAbhay Khant
10 min read
quicktype JSON Schema: Infer Schemas from JSON Samples
Infer JSON Schema from JSON samples with quicktype: CLI setup, multi-sample inference, Draft 7 output, limitations, refinement, and CI validation.
AAbhay Khant
10 min read
Zod to JSON Schema: Generate Schemas from TypeScript Types
Generate JSON Schema from Zod schemas with z.toJSONSchema(): draft 2020-12 export, recursion, unrepresentable types, AJV validation, and CI gates.
AAbhay Khant
11 min read
JSON Schema Generator: Tools & Best Practices
Compare JSON Schema generation — code-first (Zod, Valibot), data-first (quicktype), model-first. Covers validation, CI/CD, migration.
AAbhay Khant
10 min read
CSS Gradient Transparency: Alpha Channels and Fade Effects
CSS gradient transparency fades a gradient to see-through with an alpha channel on a color stop. Learn rgba syntax, scrims, and the gray-midpoint trap.
AAbhay Khant
11 min read
CSS Gradient Text: How to Create Colorful Text Effects
CSS gradient text clips a gradient to your letters with background-clip: text. Learn the recipe, the -webkit- prefix, and the fallback color you need.
AAbhay Khant
11 min read
CSS Gradient Border: Workarounds and Modern Solutions
A CSS gradient border needs a workaround: border-color takes only solid colors. Compare border-image, background-clip, and CSS mask, at 98%+ browser support.
AAbhay Khant
10 min read
CSS Gradient Performance: Rendering and Optimization
CSS gradient performance is a non-issue when static. Cost shows up on animation and huge repainted areas. Learn to profile and optimize gradients.
AAbhay Khant
10 min read
CSS Conic Gradient: Pie Charts and Color Wheels
A CSS conic gradient sweeps color by angle around a center, not by distance. Learn conic-gradient syntax and build pie charts and color wheels in pure CSS.
AAbhay Khant
10 min read
CSS Radial Gradient: Complete Guide with Examples
A CSS radial gradient fades color outward from a center point. Learn shape, all 4 size keywords, and center positioning with copyable examples.
AAbhay Khant
11 min read
CSS Linear Gradient: Syntax, Examples, and Best Practices
A CSS linear gradient paints colors along a straight line, no image file needed. Master syntax, direction angles, color stops, and repeating stripes.
AAbhay Khant
11 min read
CSS Gradients Explained: Linear, Radial, and How to Use Them
CSS gradients create smooth color transitions with no image files. Learn linear, radial, and conic syntax, color stops, and when to use each type.
AAbhay Khant
11 min read
Redirect Chain: What It Is, Why It Hurts SEO, How to Fix It
A redirect chain is a series of redirects between your URL and the final page. Nearly 1 in 12 sites has one. Learn how to find, fix, and prevent them.
AAbhay Khant
3 min read
gsc-indexer FAQ
gsc-indexer FAQ: does it index instantly, why www vs non-www matters, API key vs service account, 403 causes, and how many URLs you can process.
AAbhay Khant
3 min read
Troubleshooting gsc-indexer: 403, 401, and other errors
Fix every gsc-indexer error: 403, 401, 429/5xx, sitemap fetch failures, 'no URLs given', and the 'unexpected argument' flag-order trap.
AAbhay Khant
3 min read
Automating gsc-indexer in CI with -json and exit codes
Automate gsc-indexer in CI: cron or GitHub Actions, parseable -json output, non-zero exit codes, and sa.json stored as a secret.
AAbhay Khant
3 min read
Big runs without getting throttled: -delay, -q, and -dry-run
Run gsc-indexer over thousands of URLs without Google throttling you: raise -delay, use -q for clean progress, and survive 429/5xx backoff.
AAbhay Khant
2 min read
Track indexed-vs-not over time with -report and -diff
Track which URLs Google has indexed over time with gsc-indexer's -report and -diff flags, and watch coverage shift between runs.
AAbhay Khant
3 min read
Indexing many URLs: batch, stdin, arguments, and sitemaps
Submit URLs to Google in bulk: batch files, stdin pipes, positional arguments, and sitemap expansion, capped at 50,000 URLs per run.
AAbhay Khant
4 min read
Understanding your results: INDEXED, NOT INDEXED, and coverage states
Read gsc-indexer output: indexed vs not, coverage state, fetch state, robots state, and last crawl time, and what each one tells you.
AAbhay Khant
3 min read
Step 3: Install, build, and run your first inspection
Install Go, build gsc-indexer, and run your first URL inspection against Google Search Console in under five minutes.
AAbhay Khant
2 min read
Step 1: Create and verify a Google Search Console property
Create and verify a Google Search Console property (URL-prefix or Domain) so gsc-indexer can inspect your URLs without 403 errors.
AAbhay Khant
3 min read
What is gsc-indexer? (and what \"submit for indexing\" really means)
What is gsc-indexer? A command-line tool that asks Google to crawl and re-index your URLs through the Search Console URL Inspection API.
AAbhay Khant
2 min read
gsc-indexer docs: start here
gsc-indexer docs hub: every guide to index URLs with Google Search Console's URL Inspection API, from setup to CI automation and troubleshooting.
AAbhay Khant
4 min read
Step 2: Create a service account and grant it property access
Create a Google service account, grant it Full access to your Search Console property, and point gsc-indexer at its JSON key to stop 403 errors.
AAbhay Khant
10 min read
Private AI Coding Tools to Keep Your Code Off the Cloud
Run AI coding assistants that never send your source code to the cloud. Compare 6 private, local-first, and self-hosted coding tools for 2026.
AAbhay Khant
5 min read
Wappalyzergo vs Wappalyzer: Which Technology Detection Tool Should Developers Choose?
Compare Wappalyzergo vs Wappalyzer to understand which technology detection tool is best for developers, security engineers, and automation workflows.
AAbhay Khant
5 min read
Best Tools for Detecting Website Technologies in 2026
Compare the best tools for detecting website technologies in 2026, including options for developers, security engineers, and automation workflows.
AAbhay Khant
4 min read
How Technology Detection Works Behind the Scenes
Discover how technology detection works behind the scenes. Learn how fingerprinting tools identify frameworks, servers, and infrastructure from web responses.
AAbhay Khant
10 min read
Technology Fingerprinting Explained for Developers
Technology fingerprinting explained: the headers, cookies, and DNS records that reveal a stack, with WordPress on 40.7% of all websites (W3Techs, 2026).
AAbhay Khant
9 min read
What Is the Model Context Protocol? A Plain-English Guide
Model Context Protocol (MCP) is the open standard connecting AI to your tools and data. Learn how it works, how it differs from APIs, and why it matters.
AAbhay Khant
10 min read
What Is OpenCode? The 2026 Open-Source AI Coding Agent
OpenCode topped LogRocket's July 2026 ranking with 7.5M+ monthly devs. A MIT-licensed, model-agnostic AI coding agent.
AAbhay Khant
12 min read
HTML to Image Converter: JPEG, PNG, WebP, In Your Browser
Convert HTML to JPEG, PNG, WebP, or AVIF in your browser. No upload, no signup, your markup never leaves your device. Quality 60 cuts JPEG size 79%.
AAbhay Khant
10 min read
Text Summarizer: Extractive Summaries, Zero Uploads
Summarize articles and documents instantly with TextRank extraction in your browser. Deterministic results, adjustable length, nothing uploaded.
AAbhay Khant
9 min read
AI Image Alt Text Generator: Accessible Descriptions Fast
Generate alt text for images instantly with AI. Upload JPG, PNG, or WebP and get accessible descriptions plus captions free, no signup needed.
AAbhay Khant
10 min read
Aspect Ratio Calculator: Solve Width, Height, and Ratios
Free aspect ratio calculator: enter width, height, or ratio and get the missing value instantly. Live results for video, social, print, and CSS sizing.
AAbhay Khant
10 min read
Case Converter: Eleven Formats, One Click Each
Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case and more. Live conversion in your browser, free forever.
AAbhay Khant
9 min read
QR Code Decoder: Read Codes From Saved Images
Decode QR codes from saved images free: upload a screenshot or photo and read the hidden URL or text instantly. No camera, no app, no signup.
AAbhay Khant
10 min read
Lorem Ipsum Generator: Free, Private, In-Browser
ToolSura's free lorem ipsum generator makes placeholder text in your browser. Your text never leaves your device, with no upload, no signup, no server.
AAbhay Khant
11 min read
3D Color Cube Visualizer: See the RGB Color Space in 3D
Plot any color on an interactive RGB cube in your browser. 8-bit RGB holds 16,777,216 colors, and every point runs client-side with zero uploads.
AAbhay Khant
11 min read
Base62 Encoder/Decoder: Free Online Converter, No Upload
Encode and decode Base62 online, free and private. Six characters span 56.8 billion codes (62^6), and every conversion runs locally in your browser.
AAbhay Khant
12 min read
Free SVG Path Editor Online - Edit Bezier Curves Visually
Free SVG path editor that runs entirely in your browser. Edit bezier curves visually, fix arcs, round coordinates, and copy d strings with no uploads.
AAbhay Khant
9 min read
CSS Grid Layout Generator: Build Layouts Visually
Generate CSS Grid layouts visually with named areas, fr units, and gap controls. Free grid builder with production-ready CSS and HTML output.
AAbhay Khant
10 min read
Regex Visualizer: See Patterns as Railroad Diagrams
Visualize regular expressions as railroad diagrams instantly. Free online regex visualizer with live match highlighting, explanations, and SVG export.
AAbhay Khant
9 min read
HTML Sanitizer: Strip XSS Vectors From Untrusted Markup
Sanitize raw HTML instantly in your browser: strip script tags, event handlers, and dangerous embeds while keeping safe markup. Free XSS filter tool.
AAbhay Khant
9 min read
JWT Decoder: Inspect Tokens Without Sending Them Away
Decode JSON Web Tokens instantly in your browser: read header, payload, and claims with automatic expiration timestamps. No signup, no uploads.
AAbhay Khant
10 min read
Email Template Tester: Preview HTML Email Without Sending
Test HTML email templates free with cross-client previews, dark mode simulation, and validation. No sending, no signup, everything runs in your browser.
AAbhay Khant
11 min read
OAuth Demo Playground: Test Auth Code Flow with PKCE
Test the OAuth 2.0 authorization code flow with PKCE in your browser. Free playground with custom endpoints, token inspection, and zero uploads.
AAbhay Khant
12 min read
Bookmarklet Builder: Turn JavaScript Into One-Click Tools
Build one-click bookmarklets from JavaScript, free and in-browser. No upload, no signup. IE capped URLs at 2,083 characters, so minify first.
AAbhay Khant
9 min read
URL Redirect Checker: Trace Every Hop Before Clicking
Trace full redirect chains instantly: see every hop, status code, and final destination. Free checker for short links, affiliate URLs, and migrations.
AAbhay Khant
11 min read
HTML CSS JS Playground: Instant Live Preview, No Login
Free HTML CSS JS playground with instant live preview. Write, test, and share front-end snippets in your browser, no login or setup needed.
AAbhay Khant
11 min read
Free SVG to PNG Converter Online - High-Resolution Export
Free SVG to PNG converter that runs entirely in your browser. Export high-resolution PNGs with transparent backgrounds, no uploads required.
AAbhay Khant
12 min read
Binary to Hex Converter: Four Bases, One Free Tool
Free binary to hex converter that also handles octal and decimal. Real-time base conversion in your browser with nothing uploaded and zero sign-ups.
AAbhay Khant
11 min read
HTML Table Generator from CSV: Free Browser-Based Converter
Free CSV to HTML table converter running in your browser: nothing uploads, markup supports WCAG techniques, 95.9% of home pages had detected WCAG failures.
AAbhay Khant
12 min read
CSS Flexbox Generator: Build Flex Layouts Visually
Free CSS flexbox generator with live preview. Tune direction, alignment, wrap, and flex sizing, then copy CSS. Flexbox hit 74% of mobile pages by 2022.
AAbhay Khant
11 min read
Image Color Palette Extractor: Extract Colors from Images
Free image color palette extractor that runs in your browser. Photos never leave your device as you pull hex codes; 1.95T photos are forecast for 2026.
AAbhay Khant
11 min read
JSON Schema Generator: Build Schemas From Sample JSON Online
Generate a JSON schema from sample JSON directly in your browser, free, with nothing uploaded. Covers Draft 4 to 2020-12, plus inference traps to review.
AAbhay Khant
9 min read
YouTube Description Generator: Draft Descriptions That Work
Generate SEO-friendly YouTube descriptions instantly from your topic and keywords. Free draft generator with chapters, CTAs, and hashtag guidance built in.
AAbhay Khant
10 min read
UTF-8 Unicode Converter: Code Points, Bytes, and Escapes
Convert text to UTF-8 bytes, Unicode code points, hex, decimal, binary, and escapes instantly in your browser. Inspect BOMs, fix mojibake, no uploads.
AAbhay Khant
11 min read
Free Image Metadata Viewer Online - Check EXIF Data Safely
Free image metadata viewer that runs entirely in your browser. Check EXIF, GPS, IPTC and XMP data with no uploads before you share.
AAbhay Khant
12 min read
AI Regex Generator: Turn Plain English Into Working Patterns
Turn plain English into working regex with ToolSura's AI regex generator. Runs client side in your browser, so nothing you type is uploaded. No signup.
AAbhay Khant
11 min read
CSS Box Shadow Generator: Free Online Shadow Builder
Free CSS box shadow generator with live preview. Build inset and layered shadows, convert to Tailwind, copy clean CSS. Baseline support since 2015.
AAbhay Khant
9 min read
QR Batch Generator: Hundreds of Codes From One Spreadsheet
Generate up to 500 QR codes at once from a CSV file. Static, permanent codes delivered as high-quality PNG images in a single ZIP download.
AAbhay Khant
12 min read
Hex Code Animator: Animate Any Two Hex Colors in CSS
@property hit Baseline on July 9, 2024, so hex-to-hex CSS color animation works in every browser. Build keyframes free with the Hex Code Animator.
AAbhay Khant
11 min read
HTML Entity Encoder Decoder: The Complete Developer Guide
Free HTML entity encoder decoder that runs entirely in your browser. Convert named and numeric references, prevent XSS bugs, and fix double escaping fast.
AAbhay Khant
11 min read
Color Contrast Checker: WCAG AA & AAA Ratios Explained
Check WCAG color contrast in your browser. 83.9% of home pages failed low-contrast tests in 2026. Test AA and AAA ratios instantly, nothing uploaded.
AAbhay Khant
12 min read
Text Diff Checker: Compare Two Texts in Your Browser
Free, private text diff checker. Compare two blocks of text, side-by-side or unified, with word/character precision. 100% in browser, no upload or signup.
AAbhay Khant
10 min read
CSV Splitter & Merger: Split or Merge Large CSV Files
Split big CSVs by row count or merge many CSV files in your browser. Microsoft caps an Excel worksheet at 1,048,576 rows, so plan chunks accordingly.
AAbhay Khant
10 min read
SSL Checker: Validate Certificates Before Visitors Do
Check SSL certificates free: expiry dates, issuer, SANs, trust chain, protocols, and key strength for any domain. No login, results in seconds.
AAbhay Khant
10 min read
Privacy Policy Generator: Custom Drafts From Your Answers
Generate a customized privacy policy draft free by answering questions about your data practices. HTML, text, or PDF output with GDPR and CCPA sections.
AAbhay Khant
11 min read
UUID Validator: Check Format, Version, and Variant Online
Free online UUID Validator: check format, version, and variant instantly. Paste one ID or a bulk list; validation runs client-side in your browser.
AAbhay Khant
11 min read
JSON to YAML Converter: Convert Online With Zero Uploads
Convert JSON to YAML online free with zero uploads: ToolSura runs entirely in your browser. js-yaml logged 291.8M weekly downloads in August 2026.
AAbhay Khant
12 min read
HTML to PDF Converter Online Free - No Upload Needed
Free browser-based HTML to PDF converter. Generate PDFs from HTML with no uploads, no watermarks, and nothing touching a stranger's server.
AAbhay Khant
12 min read
CSS Minifier: Free Online Tool to Minify CSS Instantly
Free online CSS Minifier that runs entirely in your browser. Strip whitespace, comments, and bloat to shrink style sheets fast without uploading a byte.
AAbhay Khant
10 min read
Link Shortener: Tidy URLs With Custom Aliases
Shorten long links free with custom aliases and bulk processing. No login required, permanent links, and a no-tracking approach per its own terms.
AAbhay Khant
12 min read
Hex to RGB Converter: Complete Guide to Color Codes
Free hex to rgb converter that runs entirely in your browser. Learn the math behind all 16,777,216 sRGB colors, plus HSL, alpha, and CSS Color 4 syntax.
AAbhay Khant
10 min read
Free SVG Optimizer Online - Compress & Minify SVG Files
Free browser-based SVG optimizer. Compress and minify SVG files with no uploads: your files never leave your device. Cut file size 18-55%.
AAbhay Khant
9 min read
Word Cloud Generator — Free, Private, Client-Side Tool
Create word clouds from text, PDFs, or documents in your browser. No upload, no server, works offline. Export PNG, SVG, PDF free.
AAbhay Khant
9 min read
IP Address Lookup: Identify Networks, ISPs, and Ownership
Look up any IPv4 or IPv6 address for ISP, ASN, location, and ownership data. Free network intelligence with proxy and datacenter detection signals.
AAbhay Khant
11 min read
UUID Generator: Free Online UUID v4 Tool (No Sign-Up)
Free online UUID generator for Version 4 IDs. Everything runs in your browser with cryptographic randomness, plus collision math, v7 guidance, and more.
AAbhay Khant