Blog & guides
Guides for JSON escape/unescape, formatting, JWT, text, images, SEO, converters, and browser-first developer tools on Toolverse by RS.
Guides on this site
- How to format JSON online (pretty-print & minify)
Format messy API JSON into readable indented output, or minify for transport - privately in your browser with Toolverse by RS.
- HTML email preview guide: Gmail, Outlook, dark mode, and responsive QA
Test HTML email in your browser with private previews for Gmail, Outlook, dark mode, and responsive widths. Step-by-step guide to Toolverse email QA tools.
- Escape JSON Online - Escape, Unescape & Stringify Safely
Escape JSON online or unescape a JSON string in your browser. Convert JSON to an escaped string, parse escaped string to JSON - private, free, no upload.
- How to decode a JWT safely (without trusting claims)
Inspect JWT header and payload in your browser. Learn why decoding is not verification, and which claims matter when debugging auth.
- Base64 for developers: text, JSON, URLs, and what it is not
Learn when to Base64-encode text or JSON, how that differs from URL percent-encoding, and why Base64 is not encryption.
- Merge PDFs privately in your browser
Combine PDF files locally with Toolverse by RS - no upload required. Also cover split, rotate, and compress workflows.
- Private text tools for writers and developers
Convert case, count words, diff drafts, and slugify titles in your browser - without uploading manuscripts to a third-party site.
- Compress, resize, and convert images in your browser
A private image workflow: compress for email, resize for the web, convert PNG/JPG/WebP, and crop avatars - without uploading photos.
- SEO checklist before launch: meta, robots, SERP, OG
Generate meta tags, test robots.txt, preview SERP snippets, and debug Open Graph HTML locally before a page goes public.
- Convert JSON, YAML, and CSV locally
Move payloads between JSON, YAML, and CSV in your browser - private converters for APIs, configs, and spreadsheets.
- QR codes and color contrast in your browser
Generate QR codes, convert hex/RGB/HSL, and check WCAG contrast privately - no upload required.
External blog
Additional long-form writing may appear on blog.rsroshi.dev. Prefer in-app guides when linking from tool pages so crawlers never hit soft 404s.