Changelog
We ship improvements regularly. Here are the highlights from recent releases.
July 2026
Release 53 — Czech locale, 420 tools, batch API v2
- Czech (cs) eleventh locale: routing, messages, hreflang, PDF locale.
- Registry batch 11 — 20 SEO tools (JWT builder, IBAN hubs, cron builder) → 420 tools.
- Batch API: pdf-split, image-resize, rate limit, OpenAPI; collections JSON-LD; use-hub studio deep links.
- Assistant voice input (EN/DE/TR), cloud fallback on low confidence, PWA install Umami events.
July 2026
Release 52 — Turkish locale, 400 tools, batch API
- Turkish (tr) tenth locale: routing, messages, hreflang, PDF locale and studio sidebar.
- Registry batch 9–10: TOML/ULID/punycode tools plus cron parser, IBAN, UUID v7 — 400 tools.
- SEO: batch9 landings, pdf-invoice & tool-compare hubs, pipelines ItemList JSON-LD, sitemap 450+ URLs.
- Headless POST /api/batch/pdf-merge with BATCH_API_KEY; pipeline preset links on tool pages.
July 2026
Release 51 — Russian locale, GSC hygiene, SEO fixes
- Russian (ru) — ninth locale: routing, UI messages, hreflang in sitemap, /use/* landing FAQs.
- GSC hygiene: URL-prefix property docs, static sitemap/robots serving, post-deploy SEO in deploy scripts.
- Tool pages: client navigation fix for RSC serialization when switching tools in-app.
- www.tentaco.cc → https://tentaco.cc permanent redirect in Caddy/Nginx examples.
July 2026
Release 50 — full registry SEO, extension store prep, roadmap refresh
- SEO batch 7: final 46 /use/* guides (391 total) including all 17 studios; sitemap 439 URLs.
- Extension store: prepare:extension-submit script, listing checklist on /extension, verify:extension in CI path.
- Roadmap updated: KoSIT and PDF/A marked live; search indexing and extension store as current focus.
- --include-workspaces flag for landing generator; post-deploy SEO checklist aligned to 391+ guides.
July 2026
Release 49 — 345 SEO guides, mobile E2E, VeraPDF audit
- SEO batch 6: --auto 60 more /use/* guides (345 total); sitemap ~410 URLs.
- Mobile E2E: language switcher, Discover label casing, centered popular chips, landing studio CTAs, theme menu.
- Optional VeraPDF server audit: /api/validate-pdfa + validator UI when NEXT_PUBLIC_PDFA_VERAPDF=true.
- Roadmap & GSC checklist updated to 345+ guides.
July 2026
Release 48 — 285 SEO guides, KoSIT gallery, PDF/A color audit
- SEO batch 5: --auto 60 more /use/* guides (285 total); sitemap now 350 URLs.
- KoSIT: public XRechnung 3.0 fixture gallery in validator; +BR-DE mappings; credit-note (381) ZUGFeRD export.
- PDF/A-3b phase 2: DeviceCMYK color-space audit, critical vs advisory checks; PDF/A panel on ZUGFeRD upload.
- Roadmap & GSC checklist updated to 285+ guides; deploy scripts aligned.
July 2026
Release 47 — 60+ SEO landings, JSON & letter hubs, PDF/A-3b checks
- SEO batch 4: --auto 60 lands next registry tools; new /use/json-tools and /use/letter-templates topic hubs.
- PDF/A-3b: client-side conformance validation on ZUGFeRD export with certified vs best-effort badge and issue list.
- KoSIT: missing seller tax ID and invalid Leitweg-ID fixtures; extension page store badges and improved pre-store copy.
- Deploy: GSC checklist lists 165+ /use/* URLs; verify-site-url.sh keeps 100+ threshold; roadmap sync for partial PWA and workflow chains.
July 2026
Release 46 — 50+ new /use/* guides, landing OG images & workflow chains
- Batch 3 SEO landings: ~50 new atomic tool guides via landing-registry; dedicated /use/*/opengraph-image with category accent.
- Assistant v2.1: workflow chains for PDF sign→share, image crop→compress, ZUGFeRD export and credit-note paths; distinct feedback toasts.
- KoSIT: xrechnung-3.0-missing-buyer-reference fixture and BR-DE-1 test; PWA manifest shortcuts for merge, e-invoice validate, image compress.
- Deploy checks: /use/ count threshold (100+), optional og:image on landings; e2e coverage for OG route, /categories 308, studio noindex.
July 2026
Release 45 — Richer /use/* guides, 50+ new landings & PWA icon fix
- Landing pages: intro, steps, use cases, comparison tips and privacy sections (600–1000 words target) driven from tool-landings.data.json.
- 55 new /use/* SEO landings for high-value atomic tools; HowTo JSON-LD uses dedicated steps when present.
- PWA install nudge: compact app icon on mobile (studio + hero), smaller dismiss control; generic landing FAQs for batch-generated slugs.
- Sitemap regenerated for new landing routes; canonical /use/* strategy unchanged for tools with guides.
July 2026
Release 44 — Crawlable tool SEO, HowTo schema & IndexNow batching
- Tool pages: always-visible SEO section (about, FAQ, related tools) server-rendered for crawlers; sidebar CTAs stay deferred.
- Landing pages: How it works section + HowTo JSON-LD; homepage hub links to /use/* guides; dynamic tool count in meta descriptions.
- Sitemap: removed /categories URLs (redirect to /tools); llms.txt lists all landings, hubs and correct category query links.
- IndexNow: priority sort (/use/ first), submit all sitemap URLs in batches of 500 with progress logging.
July 2026
Release 43 — E-Rechnung credit notes, SEO guides, studio dock & PWA
- KoSIT: XRechnung 3.0 credit-note fixtures, BR-DE-23 mapping, credit-note badge (381) in validator UI across all locales.
- SEO: related /use/* guides on landing pages; tool cards link to SEO landings; getRelatedLandings() from registry related slugs.
- Studio: output dock on image batch convert/compress; mobile e2e for workflow preset → PDF compress and prefers-reduced-motion smoke.
- PWA: manifest shortcuts (PDF compress, image crop); install nudge on homepage hero; offline badge on mobile immersive studio; studio visit tracking on workflow complete.
July 2026
Release 42 — Roadmap refresh, SEO 50+, extension & KoSIT polish
- Roadmap updated: AI assistant v2 marked shipped; 50+ /use/* SEO landings; extension store env hooks and footer links.
- KoSIT: XRechnung 3.0 public fixtures, BR-DE rule IDs in validation tooltips, ZUGFeRD export assistant validation signals.
- Studio: image crop output dock; assistant v2.1 workflow chain suggestions and cloud structured-intent fallback.
- Mobile e2e prefers-reduced-motion smoke; Playwright mobile spec extended.
July 2026
Release 41 — AI assistant v2 (smarter local routing)
- Multi-stage routing: query-type detection, category/action signals, cross-locale synonyms, and negative intents (e.g. “no OCR”, “don't compress”).
- Rich studio context — loaded file type, XRechnung validation errors, and workflow output boost matching tools while you work.
- Session memory for follow-ups (“and now sign?”); low-confidence matches show alternatives; thumbs up/down tune local routing from your feedback.
- Ollama returns structured JSON intent only — tool choice stays deterministic locally; XRechnung/ZUGFeRD phrase routes; Vitest suite for smart routing.
July 2026
Release 40 — Mobile polish, roadmap refresh & SEO expansion
- Mobile studio chrome: stacked output dock above action bar, safe-area tokens, 44px touch targets on header, workflows and immersive controls.
- Playwright mobile spec (390×844) for homepage overflow, nav menu, PDF compress dock stacking.
- Roadmap updated with AI assistant v2 and SEO scale-up priorities; changelog release 39–40.
- Eight new /use/ SEO landings (PDF sign, ROT13, HTML entities, JSON escape, HTML to text, Unicode info, PDF rotate, image crop) with FAQ schema.
June 2026
Release 39 — ZUGFeRD assistant, workflows, CI hardening
- ZUGFeRD export assistant wizard: embed CII in PDF, validate, downloadable KoSIT PDF report and localized fix suggestions.
- Workflow presets for scan→OCR→merge and image workflows; registry migrated to helper across pdf/extra/super batches.
- CI: Vitest e-invoice suite, a11y smoke, Lighthouse budgets, sitemap test, E2E smoke matrix per studio.
- 42+ SEO tool landings, extension store prep, bookmarklet promo on /docs, compare share links.
- Tool pages defer CTAs and learn-more until interaction; output dock parity completed.
June 2026
Release 38 — Production site URL fix & SEO landings
- Default production origin https://tentaco.cc when NEXT_PUBLIC_SITE_URL is missing (fixes localhost sitemap/robots).
- Dockerfile ARG defaults for all NEXT_PUBLIC_* build args.
- Six new /use/ SEO landing pages (PDF repair, JWT, invoice, HTML studio, ZUGFeRD) + verify-site-url.sh.
June 2026
Release 37 — Deploy checklist, Schematron+, store copy, SEO FAQ
- Post-deploy checklist in DEPLOY.md and Google Search Console guide (docs/seo-search-console.md).
- KoSIT Schematron+: 6 rules (country IDs, credit notes, zero qty, net price, issue date).
- Roadmap refreshed — batch e-invoice and HTML static export marked shipped.
- Chrome/Firefox store listing polish (keywords, DE copy, AMO checklist).
- FAQ q17–20 (batch invoices, HTML export, sitemap, Umami) + SEO keywords.
June 2026
Release 36 — KoSIT+, Factur-X v2, batch invoices, static HTML, PDF repair CTAs
- KoSIT Schematron+: 8 new rules (postal address, order ref, UBL warning, currency lines, and more).
- ZUGFeRD / Factur-X PDF/A-3b-oriented export v2 with factur-x.xml, AF Data relationship, and XMP snippet.
- XRechnung validator batch mode: multi-file queue, summary table, combined JSON + per-file text ZIP.
- HTML Studio static site export ZIP (index.html, styles.css, script.js, assets/, README-DEPLOY.md).
- PDF repair callouts across PDF Studio tools via shared usePdfLoadError hook.
June 2026
Release 35 — PDF repair CTAs & batch EXIF
- PDF Compress shows a one-click Repair PDF button when xref/trailer structure errors occur.
- Image batch compress: optional EXIF/metadata strip toggle with clear hints (matches single-image compress).
- Umami analytics provider documented and wired via NEXT_PUBLIC_UMAMI_WEBSITE_ID.
June 2026
Release 34 — UX polish pass
- Home: continue-where-you-left-off chips for recent studio modes across all workspaces.
- Tool pages: studio and SEO landing CTAs; PDF grid drag feedback; document preview scroll stability.
- Image compress EXIF toggle, workflow preset cards with step badges, XRechnung results toolbar polish.
- HTML Studio run shortcut hint and project name pill; studio cards hover lift and mode count badges.
June 2026
Release 33 — HTML toolbar, e-invoice fixes, ZUGFeRD
- HTML Studio: modern IDE toolbar with clear active states, scroll-map minimap toggle and IndexedDB project save/open.
- E-invoice validator: Fix links to Document Studio invoice fields for BT-10, IBAN, payment means and line items.
- ZUGFeRD PDF export from invoice template — PDF with embedded CII XML (Factur-X basic v1).
- Unified handoff banner across studios and tools — one dismiss pattern, priority-ordered workflows.
- Mobile toolbar sweep for all StudioPdfStyleShell studios — two-row compact layout at 375px.
- HTML Studio chrome contrast fixes for vscodeDark and tryitLight themes.
June 2026
Release 32 — PDF repair
- PDF Studio: client-side PDF repair with qpdf WASM — rewrites xref/trailer tables locally in the browser.
- Structure error hints now point to Repair PDF mode; qpdf loads lazily on first use.
June 2026
Release 31 — Growth & discoverability
- SEO tool landing pages at /use/[slug] for top tools, studio OG images, dual CTAs on /studios index.
- Changelog share buttons (LinkedIn, Reddit, RSS), ⌘K shortcuts for support and feed, BMAC in immersive studios.
- Invoice validate→share workflow preset, PWA v17 with HTML templates precache, optional support nudge after 10 tool visits.
June 2026
Release 30 — Studio landing polish
- Richer studio marketing pages at /studios/[slug]: denser hero, popular mode chips, grouped mode browser and workspace preview.
- Related tools and studios sidebar, use-case tags from sidebar groups, and compact FAQ — less empty scroll on mobile.
June 2026
Release 29 — Top 5 polish
- Large PDF preview panel for single-file PDF modes; image compress keeps full before/after compare.
- Recent files in studio sidebars and workflow preset cards on the homepage.
- Mobile toolbar sweep: two-row compact layout for Video, Document and Security studios.
- XRechnung validator traffic-light summary and per-rule tooltips (EN/DE).
- Document Studio live PDF preview while filling templates.
June 2026
Release 28 — SEO landing pages, RSS & OG polish
- Dedicated SEO landing page per studio with FAQ JSON-LD, mode grid and breadcrumbs at /studios/[slug].
- Changelog RSS feed (/feed.xml), release validation script and SoftwareApplication JSON-LD.
- Custom OG images for /studios and /changelog; studio cards link to marketing landing pages.
June 2026
Release 27 — KoSIT+, PWA phase 2 & workflows
- KoSIT Schematron+: 12 BR-DE rules, profile badge, ZUGFeRD full validation and PDF validation reports.
- PWA phase 2: v16 precache for all studios, offline page lists, smarter install prompt and update banner.
- Workflow handoffs: continue bar, cross-studio recent files, 5 new pipeline presets and +10 Playwright smokes.
June 2026
Release 26 — HTML Studio, KoSIT+ & calculators
- HTML Studio: Prettier format, asset uploads, matching tag highlight and multi-file sidebar.
- KoSIT Schematron+: 8 new BR-DE rules, profile labels and downloadable validation reports.
- Studios: popular modes & related links for media studios; tax, inflation & savings calculators; document templates.
June 2026
Release 25 — Studio expansion batch
- Popular mode shortcuts, related-tool links and expanded empty-state guides across all studios.
- Document Studio: delivery note (Lieferschein) and timesheet (Stundennachweis) PDF templates.
- PWA offline v15 (+6 studios), FFmpeg loading UX, i18n mobile menus and expanded Playwright smoke tests.
June 2026
Release 24 — Store prep, Schematron+ & PDF security
- Extension download API, store badges, German listing copy and screenshot specs.
- Schematron+: buyer reference, payment means, line items and total mismatch rules.
- PDF password & permissions via browser-native @cantoo/pdf-lib with presets.
June 2026
Release 23 — HTML Studio Tryit & mobile polish
- W3Schools-style Tryit editor: 50/50 split, green run bar, fullscreen, console, snippets, template previews.
- Mobile: two-row toolbar, swipe code/preview, bottom sheet menu, compact immersive header, landscape split.
- Emmet + shortcuts, debounced auto-run, PWA offline v14 (+html-studio), Playwright mobile smoke test.
June 2026
Release 22 — Extension hub, Schematron+, offline v13
- Extension install page, pack:extension script, Chrome & Firefox store docs.
- Schematron rules: seller tax ID, IBAN check, negative line amounts.
- PWA offline v13 (+3 tools), assistant API docs, mobile studio mode picker, compare/pipeline polish.
June 2026
Release 21 — Mobile polish, file share fix & HTML Studio IDE
- Mobile studio headers with overflow menu; file exchange upload fixed for Docker (writable .data volume).
- HTML Studio premium redesign: segmented editor tabs, elevated live preview toolbar, IDE-style editor chrome.
- PWA offline v12, compare & pipeline polish, assistant batch/route API, studios build fix.
June 2026
Release 20 — Calm studios, Schematron & Firefox
- Studio UI declutter: quieter sidebars, compact banners, recent modes only on file-forward studios.
- E-invoicing Schematron-lite rules (VAT category, due date, unit codes) in XRechnung validator.
- Firefox extension manifest, Chrome Web Store prep, PWA offline v11 with three more tools.
June 2026
Release 19 — Workflow handoff, extension options & compare modes
- Text workflow handoff between JSON formatter, studios and JWT decode — auto-advance on format in json-jwt-inspect.
- Extension options page: custom base URL and locale via chrome.storage.sync.
- Compare studio mode pickers, nested PDF bookmark tree read/import, and four more offline tools.
June 2026
Release 18 — Extension, EN16931 & offline PWA
- Chrome/Edge MV3 extension with Open in Tentaco context menu; shared bookmarklet routing module.
- EN16931 invoice checks: BuyerReference, seller VAT, payment means, line items, Leitweg-ID and profile version hints.
- Offline precache for core tools, compare shared-file sessions, studio OG accents and mobile studio drawer.
June 2026
Release 17 — Compare, bookmarklet & PDF bookmarks
- Tool compare: studios in dropdowns, shareable links, diff export and preset pairs with privacy badges.
- Bookmarklet with correct domain, XML/YAML/UUID/email/IP/hex detection; PDF bookmark table with flat add/export.
- PWA install prompt, expanded offline shell, studio OG badges and roadmap refresh.
June 2026
Release 16 — Privacy, e-invoicing & OG
- Privacy tier badges on all tool listings, category legends and compact studio cards.
- E-invoicing validator with DOMParser, ZUGFeRD PDF extraction and expanded workflow handoffs.
- OpenAPI viewer polish, per-tool OG images with category accent and roadmap refresh.
June 2026
Release 15 — Batch PDF & workflow handoff
- Batch PDF in PDF Studio: compress multiple files to ZIP or merge all into one — fully local.
- Studio workflow banner with file auto-handoff between steps; privacy badges on tool cards and featured studios.
- OpenAPI viewer YAML input, roadmap refresh and build/lint cleanups.
June 2026
Release 14 — Unified studio polish
- All studios share the PDF-style shell: collapsible sidebar, focus mode and consistent toolbar layout.
- Compact empty guides, recent modes and cross-studio handoff; HTML, Code and Text studios stay distraction-free.
- Homepage simplification, data-studio file import and sidebar collapse fix across every studio.
June 2026
Release 13 — Assistant & trust
- Context-aware assistant, clipboard tool hints, optional Ollama bridge and step-by-step spotlight guides.
- Privacy tier badges, tool-of-the-week, embed generator, per-tool OG images and changelog RSS feed.
- Status page, brand press kit extensions, bookmarklet, E2E mascot tests and registry lint improvements.
June 2026
Release 12 — UX & workflows
- Public roadmap, tool compare mode, studio workflows with recent history and cross-studio file handoff.
- Mascot branding polish (transparent PNGs), recent studio modes, keyboard shortcuts in all studios.
- Release 12 changelog, /compare page and improved workflow presets (image→PDF, JSON→JWT).
June 2026
Release 11 — 62 new tools & developer studio
- API Studio: OpenAPI viewer, JWT inspector, HAR viewer, CSP generator/decoder, DNS lookup, SSL viewer and more.
- PDF, image, video, text and design studios expanded — form fill, sprite sheets, SVG to React, word cloud and 50+ more.
- Tool polish: extract options, HTTP handoffs, sidebar search in all studios, /features page and ⌘K studio mode search.
June 2026
Release 10 — Growth & feedback
- Thumbs-up/down feedback widget on templates and tools, Text Hub fun group collapsed by default.
- PWA offline shell (optional), expanded SEO metadata and FAQ for share links & OCR.
- E2E tests for share decode, OCR mode and invoice validation; deploy .env.example updates.
June 2026
Release 9 — Share, OCR & compliance polish
- Template share links on all letter/document templates, lz-string compression, invalid studio mode redirects.
- PDF OCR for all pages with progress & cancel, API proxy, visual image crop, orphan tool cleanup.
- Invoice §14 UStG validation, new templates (Ratenzahlung, Vollmacht, Mietbescheinigung), compact mobile studio shell.
June 2026
Release 8 — Letters & documents (DE edition)
- 8 polished HTML editor themes, sidebar scroll fix, PayPal Käuferschutz fee calculator.
- 3rd dunning template, credit note (Gutschrift), print-ready A4 previews, pipeline step indicator.
- Mobile sidebar drawer, legal links in file exchange & assistant, expanded FAQ and E2E tests.
June 2026
Release 7 — Studio polish & letters
- All live studios in fullscreen, HTML editor syntax themes and VS Code-style color swatches, collapsible sidebar.
- Dedicated attention line in letter templates, 2nd dunning example, hydration fixes for assistant & sidebar.
- Pipeline presets & collection workflows, audio waveform metadata, cloud assistant fallback, snippets via ⌘K only.
June 2026
Release 6 — Templates, search & studios
- Template form i18n (letters & documents), Kleinunternehmer §19 toggle, Einschreiben footer, and new offer/order/proforma templates.
- Sidebar search & collapsible groups, collections edit, pipeline presets, Code/Design/Converter/Security/Text Hub tools.
- HTML Studio share links, ZIP export, and expanded E2E smoke tests.
June 2026
Studios expansion & PDF security
- PDF password set/remove and permissions tools in PDF Studio; Document Studio guide with sample templates.
- Text Hub +25 fun & utility tools; Security Studio validators; Web & SEO UTM and meta checkers; Code/API dev utilities.
- Letter & document guide i18n, collections refresh, intent search enrichment, HTML Studio ZIP export and new templates.
April 2025
Mobile UX & new studios
- Responsive studio sidebars and touch-friendly mode switching on phones and tablets.
- Design Studio, Web & SEO Studio and Security Studio launched.
- Command palette (⌘K) search covers studios, tools and site pages.
May 2025
HTML Studio templates & preview
- Starter templates for landing pages, portfolios and dashboards in HTML Studio.
- Dedicated preview-only mode with device frames and background themes.
- Live split editor with autosave and one-click HTML export.
June 2026
Converter Studio & studio polish
- Converter Studio bundles units, encoding, data sizes, timezones and file sharing.
- Text Hub gained 12 additional tools in the sidebar.
- Home page and studios directory updated for 17 live studios.
June 2026
Letter Studio, Document Studio & 18 studios
- New Letter Studio with DIN 5008 guide, dunning, withdrawal and complaint templates.
- New Document Studio for invoices, receipts and resumes — separate from PDF editing tools.
- Text Hub expanded with 12 encode & format tools; popular shortcuts in Calculator and Finance studios.