Choose the tool by the thing you need to create, then check the preview, payload, file format, and destination before sharing it.
Files, links, and web tasks
Utility Tools
Browser-first utilities for QR codes, links, files, formats, web snippets, and other practical tasks that do not need a spreadsheet-style calculator.
28 tools live
Explore categories7 tool groups
Tools in this category
UTM Link BuilderUse this UTM link builder to create trackable campaign URLs for newsletters, ads, social posts, QR codes, partner links, and launch handoffs.JSON Formatter / ValidatorUse this JSON formatter and validator to clean API responses, config snippets, webhook payloads, JSON-LD drafts, and copied data before sharing or debugging.JWT Decoder and Claims InspectorUse this JWT decoder and claims inspector to review token header fields, payload claims, timestamps, scopes, audience, issuer, and signature boundaries before debugging an auth flow.Text and JSON Diff CheckerUse this text and JSON diff checker to compare API responses, config snippets, copy drafts, JSON payloads, and generated output before sharing or debugging.Cron Expression Explainer and Next Run PreviewUse this cron expression explainer to review scheduled jobs, automation rules, deployment checks, cleanup tasks, and recurring reports before saving a cron schedule.Hash Generator and Checksum ToolUse this hash generator and checksum tool to create deterministic text and file digests for release notes, API examples, signed payload checks, docs snippets, and integrity comparisons.Regex Tester and ExplainerUse this regex tester and explainer to debug JavaScript patterns, validate sample matches, inspect capture groups, and understand the pattern before pasting it into code.Color Converter HEX / RGB / HSLUse this color converter to translate design values between HEX, RGB, and HSL, copy CSS-ready color strings, and quickly check whether black or white text is more readable.CSV / TSV Formatter + CleanerUse this CSV / TSV formatter and cleaner to tidy pasted spreadsheet rows, normalize imports, convert delimiter formats, and inspect table shape before copying data elsewhere.Markdown Table GeneratorUse this Markdown table generator to turn pasted spreadsheet rows, CSV, or TSV into a clean Markdown pipe table for READMEs, docs, issues, and notes.UUID GeneratorUse this UUID generator to create random identifiers for database rows, fixtures, logs, config files, prototypes, and test records without sending values to a server.Base64 Encoder / DecoderUse this Base64 encoder / decoder to inspect API payloads, URL-safe tokens, QR text, config snippets, and copied encoded strings before sharing or debugging.
Show all 28 tools
HTML Entity Encoder / DecoderUse this HTML entity encoder / decoder to escape snippets for display, inspect CMS copy, decode copied markup, and check text before pasting into HTML fields.URL Encoder / DecoderUse this URL encoder / decoder to clean campaign links, query values, path segments, QR payloads, redirects, and copied URLs before sharing or debugging.URL Parser / Query String InspectorUse this URL parser to audit campaign links, redirects, QR destinations, support tickets, and copied URLs before sharing, documenting, or debugging them.URL Cleaner and Tracking Parameter RemoverUse this URL and query string cleaner to remove tracking parameters and make campaign, social, ad, email, QR, and support links easier to share, QA, document, or hand off.Redirect Chain CheckerUse this redirect chain checker to verify campaign links, affiliate URLs, QR destinations, cleaned links, redirects, and support tickets before publishing or printing.Robots.txt + Sitemap CheckerUse this robots.txt and sitemap checker to verify basic search discovery signals before launching, indexing, redirecting, or submitting a site.Canonical URL + Meta Robots CheckerUse this canonical and meta robots checker to verify page-level indexing signals before launch, Search Console inspection, redirects, or sitemap submission.Open Graph + Twitter Card CheckerUse this social preview checker to verify share cards before launching a page, posting a campaign link, sending a newsletter, or handing off a URL for distribution.JSON-LD Structured Data CheckerUse this JSON-LD structured data checker to verify parseable schema markup before publishing, requesting indexing, debugging rich results, or handing off a launch page.HTTP Headers + Cache CheckerUse this HTTP headers and cache checker to verify final response headers before launch, SEO QA, CDN debugging, redirect handoff, or production release review.Heading Structure + H1 CheckerUse this heading structure checker to audit one published page before launch, SEO handoff, content QA, accessibility review, or page-template cleanup.Image Alt Text CheckerUse this image alt text checker to audit one published page before launch, accessibility review, image SEO review, content QA, or template cleanup.Page Links + Anchor Text CheckerUse this page links and anchor text checker to audit one published page before launch, SEO handoff, affiliate review, content QA, or redirect debugging.QR Code GeneratorUse this QR code generator to create a scannable code for links, WiFi access, contact details, coupons, menus, signs, flyers, and handoffs without uploading the payload.Website Page QA ReportUse this website page QA report before publishing or promoting an important page. It combines the existing Toolkit Shelf checkers into one repeatable first pass, then links each result to the specialist tool for deeper review.Secure Password GeneratorUse this browser-only password generator to create a unique random password without uploading or saving the generated value on Toolkit Shelf.
How to use this hub
Pick the tool by task, then check the assumptions.
Utility tools cover practical browser-side outputs that are not spreadsheet-style calculators: UTM links, QR codes, formats, snippets, downloads, and other small handoffs that need a clean file or payload.
Prefer client-side utilities when the payload may contain contact details, WiFi information, drafts, or files that do not need to leave the browser.
Generated utility outputs should be tested in the real app, printer, scanner, or platform where they will be used.
Common tasks
Start with the job, then open the matching tool.
Find the matching calculator for a specific question.
Create, encode, inspect, and QA UTM links for newsletters, ads, partner links, QR handoffs, and launch checklists.
Create QR codes for URLs, WiFi networks, and contact cards before adding them to signs, menus, flyers, or handoff docs.
Draft names, slugs, metadata, and link-adjacent copy before publishing a page or campaign.
Use character and text utilities to keep payloads readable before encoding or sharing them.