Open & inspect
Open your PDF locally or enter a bounded large-file viewing session. Check layout before editing.
PDF reader, search, page navigationA KT Group product · Standalone installable software · DocuSphere360 family
DocuSphere360 PDF Studio — A KT Group Product
Edit with confidence.
Work across devices.
A focused PDF workspace for desktop and mobile: open, edit, annotate, review, organize and export. Connect to enterprise document management when Identity360, License360 and storage provider gates are commissioned.
- Windows · macOS · Linux
- Android QA · iOS source
- Licensing through PricingHub
Enterprise PDF workspace
The everyday PDF editor—with a deeper enterprise toolkit.
DocuSphere360 PDF Studio is designed as a standalone editor, with connected Cloud and enterprise options. Start with familiar menus, ribbons and pages. Add document intelligence, form and signature workflows, secure review, version history, consent-led recovery and organizational controls when your edition and release support them.
FROM ACTION TO OUTCOME
Every PDF has a clear path from opening to a verified result.
Start locally, complete supported editing and review tasks, then choose an authorized export or governed handoff.
Edit & annotate
Use supported text, annotation, forms, images, page and OCR tools with explicit capability limits.
Edit PDF, OCR360, Layer StudioReview & recover
Preserve source integrity, track local comments, save revisions and recover a verified working copy.
Comments360, Recovery360Save & share
Export an approved PDF, or use an authorized DMS write-back after Identity360, License360 and storage acceptance.
Verified Save As, governed Cloud bridgeWHY SUBSCRIBE
Move from isolated PDF tasks to a repeatable document workflow.
PDF Studio productivity can reduce duplicated effort. Advanced, signed and regulated PDF operations require separately accepted editing routes.
A focused PDF workflow
Open, edit, annotate, manage pages and export documents from a familiar, task-based workspace.
Less manual recreation
Use supported PDF text, forms, OCR review, conversion and Create360 workflows instead of starting over.
Local-first work
Keep local files under user control and choose when to save, export, share or request Cloud access.
Desktop and mobile continuity
Use shared product concepts across Windows, Linux, macOS and Android with capabilities clearly scoped by platform.
Review with recoverability
Use local comments, protected working copies and verified Save As for supported document classes.
Optional enterprise governance
Connect to DMS identity, versioning, storage and approval services when provider and entitlement checks are commissioned.
Use only what you need
Guided, standard and specialist experiences help different personas access the right actions.
Commercial rights remain explicit
Subscription, seats, storage and AI allowances are determined by PricingHub and License360—not assumed from a marketing page.
Engineering evidence ≠ certification
UAT tests demonstrate specific software behavior; production use requires independently accepted controls.
REAL SOFTWARE · ENGINEERING EVIDENCE
Real engineering screens, with context and limitations.
Screens show actual software in controlled engineering QA. They demonstrate evaluated UI states, not independent production certification or unrestricted feature parity.
Native desktop review, threaded PDF comments and local Save As guidance.
Desktop R35.52 Linux QAOpen full screenshot
R35.50 editor showing the PDF editing surface, menus and source selection.
Desktop R35.50 QA predecessorOpen full screenshot
Templates and document creation presented in the desktop PDF Studio interface.
Desktop R35.50 QA predecessorOpen full screenshot
R88.27 displays a real synthetic multi-page PDF fitted to the available viewport.
Android R88.27 QAOpen full screenshot
A responsive Edit PDF drawer with contextual instructions and tool actions.
Android R88.27 QAOpen full screenshot
Working mobile layer controls and scroll-safe panel structure in the WebKit QA harness.
WebKit R88.27 QA; iOS native build pendingOpen full screenshot
Page organization controls in the R88.27 mobile WebKit QA pass.
R88.27 QAOpen full screenshot
The text editor remains readable with a simulated 390 × 470 keyboard viewport.
R88.27 browser keyboard QAOpen full screenshot
Responsive zoomed document with horizontal panning and page focus.
R88.27 browser QAOpen full screenshotEvidence boundary: R35.52 desktop and R88.27 Android/QA browser runs are engineering candidates. Mobile WebKit screenshots are browser QA, not proof of a signed iPhone build. DMS cloud write-back, independent redaction/PAdES and million-page editing are not production-certified.
THE PRODUCT EXPERIENCE
Your document.
Your tools.
One intuitive studio.
DESIGNED FOR REAL PDF WORK
Create, edit, organize, sign and review PDFs in a familiar workspace built around your document.
Menus, ribbons, page previews and a spacious canvas keep tools close at hand. Connect collaboration and governance when you need them.
✓ Intuitive tools
✓ Desktop & Cloud
✓ Governed workflows
Explore the complete toolset
◆ DocuSphere360 PDF Studio — Board Report.pdf
NUMERISH
All tools
TEdit text▤Annotate▦Pages☷Forms✎Signatures◫OCR▧Redact⇄Compare⋯More
DOCUMENT WORKSPACE
Quarterly operating review
A shared place for edits, review and controlled revision history.
24Pages
03Reviewers
v2Revision
◉ Review note
◆ DocuSphere360 PDF Studio Cloud — Design Review.pdf
CLOUD WORKSPACEReview tools◫Preview✎Comment▤Markup↗Share◷Versions↺Recovery⋯More
CLOUD REVIEW PREVIEW
Design review package
Collaborate on documents with comments, permissions and revision context.
Review copyv3
Document review
DESKTOP EXPERIENCE
The full editing workspace, close to your files.
Open and work on local PDFs with an editor-first interface. Connect to Numerish services when your plan and organization authorize them.
Local-first workflowsPDF tool ribbon and reusable workspacesOptional connected governance
Illustrative interface. Tool availability varies by operating system, edition, integrations and verified release. The release catalogue below determines which installers are publicly available.
EXPLORE THE CAPABILITIES
Every PDF task.
One powerful toolkit.
Create. Refine. Collaborate. Protect.
TOOLS FOR THE COMPLETE DOCUMENT JOURNEY
From precision editing and intelligent OCR to forms, signatures, collaboration and document protection—all organized around the way you work.
Discover 16 capability areas. Individual tools vary by edition, platform and verified release.
Precision text & content editing
Text selection, bounded semantic replacement, controlled reflow, layout geometry, images, objects and explicit change receipts.
Text and layout operations · native-engine dependentPages & document assembly
Insert, rotate, duplicate, move, extract, delete and rearrange pages. Merge files, split ranges and prepare clean outputs.
Page organizer · merge / split / extractForm Designer & Form Filler
Create and fill text fields, checkboxes, selections and signer fields. Inspect field properties and prepare repeatable forms.
AcroForm workflows · advanced field behavior variesOCR360 & editable reconstruction
Recognize scanned pages, search extracted text and review word, line, block and paragraph geometry with confidence indicators.
OCR confidence and human-review workflowConvert, export & optimize
PDF creation, supported office conversion, file optimization, compression, document packaging and governed PDF/A pathways.
Format coverage depends on certified convertersPrint production & output preview
Preflight-oriented rendering, ICC profiles, output preview, color separations and CMYK ink-coverage analysis.
Attested native rendering and RIP providers requiredAnnotations & review
Highlights, comments, markup, callouts and collaborative review notes with version-linked context.
Review comments can remain separate from PDF bytesCompare & revision history
Preview previous versions, identify visual or textual changes, preserve original content and reconcile edit conflicts.
Immutable versions and SHA-256 preconditionsShare, send & collaborate
Controlled sharing, recipient permissions, expiry, review handoff and connection to an authorized canonical document workspace.
Connected collaboration requires account authorizationSign, initials & reusable signatures
Prepare signature and initial fields, retain user-authorized reusable signatures and route higher-assurance signing to certified eSign/PKI services.
Saved signature ≠ independently verified digital signatureRedaction, protection & permissions
Controlled removal workflows, restrictions, encryption options and governance of confidential information.
Permanent redaction must pass content-removal verificationAccessibility & archival quality
Tagged PDF/PDF/UA remediation workflows, structure checks, validation evidence, PDF/A preservation and accessibility review.
Independent conformance validation requiredDigital signatures & evidence
PAdES profiles, certificate controls, timestamp and revocation evidence, tamper checks and governed signing receipts.
Trust services and higher profiles require live verificationAI-assisted document work
Policy-governed assistance for extraction, navigation, review and document analysis where AI entitlements are enabled.
Privacy, cost metering and human-review controls applyAutoSave360 & Recovery360
Encrypted recovery checkpoints, restart prompts, local save indicators, version-conflict safeguards and planned cloud continuation.
Browser review-draft recovery tested; full PDF replay is still gatedSupport diagnostics & secure recovery
Crash analysis, checkpoint triage, consent-led support cases and metadata-first investigation without exposing document plaintext.
Controlled decryption requires independent approval and keys ONE STUDIO FAMILY
PDF work, your way.
Choose the workspace that fits your day.
DESKTOP · CLOUD · CONNECTED ERP
Work locally, collaborate through a browser or manage PDFs with enterprise document controls. Each experience has a distinct workflow and release scope.
01PDF Studio Desktop
Deep, local-first productivity.
An installable editor experience for Windows, macOS and Linux, with mobile platform targets. Organize, review and prepare PDFs near your local files.
- Familiar file menus, ribbon and editing tools
- Local document control and device-based workflows
- Optional Identity360/License360 services
- Native-engine and installer certification govern availability
02PDF Studio Cloud
Document work in the browser.
A connected Studio experience designed for shared review, secure drafts, cross-device continuation and enterprise document handoff.
- Browser document preview and collaborative context
- Encrypted local checkpoints and recovery design
- Role-aware sharing and revision history
- Cloud editor/sync capabilities roll out after certification
03DocuSphere360 connected
One authoritative document record.
Use the PDF Studio workspace alongside DocuSphere360 repository permissions, controlled revisions, evidence and organizational policies.
- Tenant-aware access and document permissions
- Version history and protected revision comparison
- Governed reviews and sharing workflows
- One canonical document repository, not duplicate masters
FEATURE & PLATFORM MATRIX
Compare your workspace.
Three ways to work with the same PDF Studio family.
FIND YOUR BEST-FIT WORKFLOW
See how editing, collaboration, signatures, recovery and document governance differ across Desktop, Cloud and ERP-connected workspaces.
A product-direction comparison. Actual functions depend on your edition, integrations and verified release.
| CapabilityCompare by workflow | Desktop StudioInstallable · Local-first | PDF Studio CloudBrowser · Connected | ERP-connectedGoverned documents |
|---|---|---|---|
| Primary working style | Installable · local-first | Browser · connected | Document-governed |
| PDF opening & preview | Device files | Authorized web document | Canonical PDF preview |
| Advanced editing engine | Native file-backed editing UAT · certification pending | Shared editor · integration gated | Bridge pending certified editor |
| OCR, forms & page tools | Engine / edition dependent | Engine availability dependent | Editor integration dependent |
| Signature workflows | Stored signature design · optional PKI | Connected signing design | Governed eSign service |
| Save and recovery | Local verified revisions for supported PDFs; enterprise journal acceptance pending | Encrypted browser drafts · sync planned | Versioned save and scoped draft bridge |
| Sharing & collaboration | Via connected services | Shared review workflow | Tenant ACL and controlled shares |
| Version evidence | When connected | When connected | Canonical revisions, checksums, audit |
| Recovery support | Device-assisted / key-dependent | Customer-authorized support workflow | Support360 governance integration |
A feature described as designed, connected, dependent or planned may require separate entitlement, external service, device capability or verified release before use.
EDITION GUIDE
Find the right level of control.
Start with everyday PDF tasks, move into advanced professional workflows, or bring documents under organizational policies.
| Compare editionsCapabilities by use case | FreeEssential productivity | ProProfessional workflows | SovereignOrganization-governed |
|---|---|---|---|
| Primary goal | Essential PDF productivity | Advanced individual/team work | Controlled enterprise estates |
| Document editing | Core tools, as released | Expanded tool allowances | Policy-managed capability sets |
| OCR, conversion & compare | Edition-dependent | Advanced allowances | Governed service policies |
| Sharing & eSign | Optional/limited | Connected features | Role-aware enterprise governance |
| Licensing & deployment | Individual access | Professional licensing | Organization/device controls |
| Support & recovery | Guides and standard support | Professional support options | Enterprise policy & consent controls |
This edition guide is descriptive. It does not grant a feature or set a price, allowance or trial entitlement.
AUTOSAVE360 + RECOVERY360
A crash should not mean starting from scratch.
PDF Studio is being engineered for encrypted local checkpoints, transparent save indicators, recovery on relaunch and conflict-aware synchronization. It clearly separates saved on this device, synced to the cloud and committed document version.
01 · CaptureStore supported draft operations securely as work changes.
02 · RecoverDetect unfinished sessions and let users review or discard a draft.
03 · ReconcileNever silently overwrite a newer document or invalidate a signed original.
Encrypted browser review-draft recovery has passed relaunch testing. Full PDF-content recovery, native Desktop journals and Cloud synchronization are under engineering and release controls.
Recover your previous session
We found a protected draft for Board Report.pdf.
Draft integrityVerified
Document historyProtected
Restore behaviourReview before commit
Restore draftCompare revisions
Illustrative product workflow SECURITY · IDENTITY · SUPPORT
Protect your PDFs.
Respect your privacy.
Document assurance without unnecessary access.
CONFIDENTIALITY COMES FIRST
Control revisions and permissions, investigate technical issues through safe diagnostics, and keep sensitive content protected.
Support-assisted recovery is designed around customer consent, independent approval and access to the correct encryption keys—not unrestricted administrator access.
01INTEGRITY
Governed revisions
Keep a clear document history with role-aware access, version integrity and review evidence when connected to enterprise services.
02DIAGNOSTICS
Inspect without decrypting
Investigate crashes, upload integrity and synchronization status using technical metadata before requesting document content.
03AUTHORIZATION
Recovery with consent
Customer authorization, independent approval and expiring access are central to the governed support-recovery design.
04KEY CONTROL
Keys remain essential
An uploaded encrypted file cannot be unlocked without an authorized recovery key. Lost keys or damaged files may prevent recovery.
Connected Numerish capabilitiesDocuSphere360Identity360License360eSign & SealSupport360Observability360
Connected functions and support-led decryption are subject to approved services, applicable policies and verified release availability.
BUILT FOR REAL-WORLD DOCUMENT WORK
One PDF Studio.
Everyday workflows.
For individuals, teams and regulated organizations.
MADE FOR THE WORK BEHIND THE PDF
Review contracts, prepare reports, coordinate technical drawings and manage records—with the tools and controls appropriate to each team.
Review & signCompare & assembleControl & retain
01CONTRACTS
Legal & professional services
Review agreements, prepare signature fields, identify sensitive information and retain earlier revisions.
02REPORTING
Finance & assurance
Annotate reports, compare versions and prepare supporting documents for controlled financial reviews.
03PROJECTS
Engineering & construction
Assemble drawing sets, record review notes and coordinate revisions across multidisciplinary teams.
04RECORDS
Government & regulated teams
Apply role-based document controls, governed handoffs and records-retention policies where supported.
Illustrative workflows. Individual tools, integrations and governance controls depend on the licensed edition and verified release.
FREQUENTLY ASKED QUESTIONS
A few things worth knowing.
Quick answers about standalone use, Desktop and Cloud, signatures, recovery, privacy and product availability.
06 QUESTIONS ANSWERED
Choose a question to expand its answer. All details remain available whenever you need them.
Is PDF Studio standalone, or do I need ERP360?
PDF Studio is designed as standalone installable software. Enterprise connections are optional and governed by licensing, identity, availability and organization policy. The ERP-connected workspace is not required for ordinary local use.
What is the difference between Desktop and Cloud?
Desktop prioritizes local files and a native editing experience; Cloud focuses on browser-based access, authorized collaboration and connected workflows. Some advanced operations require additional certified services or specific platform releases.
Can I reuse a saved signature?
Reusable signature handling is part of the Studio experience design. A stored handwritten signature is different from a cryptographically verifiable digital signature; higher-assurance signing requires qualified certificate and provider controls.
Can I recover edits if my application or browser crashes?
Recovery360 uses encrypted checkpoint principles and explicit restoration. Browser review-draft recovery has been tested, while native Desktop journals, whole-PDF replay and Cloud synchronization are subject to further release integration. No software can recover changes that never reached durable storage.
Can Numerish support decrypt my file?
Not by default. Diagnosis can use safe metadata. Any supported content recovery requires authorization, appropriate keys, customer consent, independently approved access and applicable retention rules. An encrypted file alone may not be recoverable.
Where can I find downloads and exact plan entitlements?
Verified downloads appear in the release catalogue on this page. Actual prices, trials and plan rights are resolved through Numerish PricingHub and License360 rather than assumed from this feature overview.
Downloads & releases
Verified downloads for your platform.
Only approved, verified installers appear here. Check release versions, supported platforms, checksums and version history before installing.
Latest stableChecking…Release catalogue
| Version | Released | Channel | Platforms | Notes |
|---|
Engineering and production releases are distinct. Desktop R35.52 and Android R88.27 are tested UAT builds. Signed native releases, independent PAdES/redaction/PDF/A/PDF/UA validation and governed Cloud write-back remain production-gated. The live download catalogue below never substitutes unapproved test builds for certified releases.
LATEST ENGINEERING CANDIDATES · NOT PRODUCTION APPROVAL
Evidence-backed updates across desktop and mobile.
Desktop R35.52 introduces a file-backed worktree, checked local PDF note revisions and verified Save As for a restricted class of unsigned classic PDFs across Windows/Linux/macOS source. Android R88.27 improves opened-document responsiveness, keyboard-safe editing panels, Layer Studio and mobile navigation. Both builds have synthetic QA evidence.
Release distinction: these are unsigned engineering candidates. macOS/iOS native-device approval, app-store signing, PAdES/PDF/A/PDF/UA/secure-redaction certification, dense 5 GB editing, DMS binary write-back and independent production approvals remain open.
DOCUMENTED UAT · NOT A SUBSCRIPTION OR STABLE RELEASE
Desktop R35.52 + Android R88.27
Engineering screenshots, QA logs and version-specific release receipts
Explore actual software screenshots ↗
The production download catalogue above remains fail-closed for unsigned test builds.
ROI360 · VALUE & SUBSCRIPTION
Estimate the value of less repetitive PDF work.
Model potential time released from manual PDF handling and tool consolidation without treating it as guaranteed cash savings.
Plans
Start free. Add governance when you need it.
Commercial amounts are resolved from PricingHub for your country, currency and applicable tax—not hard-coded into this page.
Essential PDF work
For individuals who need reliable core PDF productivity.
- Core PDF viewing and editing
- Annotations and page tools
- Local document workflows
Professional productivity
Advanced document work, AI allowances and connected Numerish capabilities.
- Advanced PDF toolset
- OCR, compare and conversion allowances
- eSign and connected governance options
Pro free trialAwaiting approval
14-day trial requested · Independent Finance approval and activation pending
No automatic activation or payment.Enterprise assurance
For controlled estates, regulated teams and sovereign operating requirements.
- Enterprise licensing and device controls
- Governed revisions and evidence
- Deployment and assurance controls
Sovereign evaluation trialAwaiting approval
14-day trial requested · Independent Finance approval and activation pending
Governed deployment and identity checks required.PDF Studio trial availability
Trial eligibility is being checked.
A pricing policy preview is not a trial activation. Licensed evaluation access will open only after approved pricing, identity, License360 and native release certification. A product demonstration is a separate evaluation experience.
DocuSphere360 PDF Studio
Choose your platform
Check the revised figures before final approval.