Octo for the CDR format

Each file states its own version. What stays is decided by you.

CDR is closed and not backward compatible, but each file's header says which version it was saved in. Octo inventories the archive without opening CorelDRAW, prepares the copy in the recipient's version, converts to SVG with open-source tools that read CDR and shows what the conversion lost. The original stays intact; the artwork, disposal and delivery stay with people.

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Backward compatibilitynoneaccording to Corel: an old version does not open a new file

Header read12 bytesRIFF + CDR + version, or the inner part of the ZIP

Inkscape CDR filter7–X4as the filter describes itself

Sources10listed at the end of the page

What Octo does with your CDR archive.

Six possible deliverables, drawn from the survey. All of them start with a copy and reading, all of them check the result by content, and all go to review by whoever is responsible for the artwork.

Inventory without opening CorelDRAW

Each file's internal version from the header (RIFF, ZIP or the old Waldo format), size, date and sha256. Read-only, on a read-only mount.

Deliverable: acervo.csv and a summary by version

Duplicates and backup copies

Same sha256 in different folders, Backup_of_ and lock files separated, so the count shows the real archive.

Deliverable: list of duplicates with the first path

Copy in the recipient's version

A written policy per destination and a CorelDRAW macro that saves the copy in the chosen version, without saving the original, with a log of each file.

Deliverable: copies and a log for the designer to check

Conversion to SVG and PNG

libcdr and Inkscape on copies, with a time limit per file, so a corrupted file does not bring down the batch.

Deliverable: SVG, preview and manifest

Checking what was lost

Paths, texts and images counted; fonts outside the studio's list and external images flagged. What is missing goes to the designer.

Deliverable: conferencia.csv with the suspects

Personal data flagged

Old badges, labels and mail merges keep names inside the CDR. These files are flagged before any conversion to text.

Deliverable: list for the data protection officer

Eight arms, one checked archive.

The same Octo cycle, applied to CDR files. Each arm has a narrow role; people approve the artwork, decide on disposal and answer for the data.

Discovery
Maps what already exists

Where the files are, how many there are, which workstations have CorelDRAW and which version, and who files are sent to.
Data
Builds the inventory

Internal version, container, sha256, duplicates and open-source read, one file per row.
Security
Handles access and data

Read-only mount, files with personal data flagged (LGPD), nothing sent outside without approval.
Architecture
Chooses the path

Header, libcdr, Inkscape or a CorelDRAW macro, depending on the task and the file version.
Development
Writes the scripts

Inventory, conversion, check and macro, with the source of each rule noted in the file.
Review
Checks by content

Shapes, texts, fonts and pages counted, PNG next to the original PDF. "The SVG was generated" is not a check.
Release
Prepares the delivery

Inventory, copies and manifest. Sending to the print shop and migrating the server happen with a person's approval.
Documentation
Records what holds in your environment

Version policy per destination, tools and versions used, who approved each batch and how to roll back.

Octo works with copies and reading; the original stays intact. It does not approve artwork, does not decide on disposal and does not hold anyone's license.

Each task, its own path.

The criteria Octo uses to choose, with the documented limit of each path.

Task	Path	Note
Find each file's version	Python reading the header	No CorelDRAW needed; internal number, not the commercial name
Find duplicates	sha256	Backup copies listed separately
Test whether the open-source reader opens it	`cdr2raw` with a time limit	Separate process per file
Preview and index text	`cdr2xhtml` or Inkscape	For search, not for production
SVG or PDF for migration	Inkscape (libcdr)	Filter describes itself as 7–X4; fidelity to be checked
Save in the recipient's version	VBA macro with `SaveAs`	CorelDRAW open and a person present
PDF faithful to the original	Publish to PDF in CorelDRAW	See the batch export field
Know each file's fonts and links	Macro walking through the shapes	Only CorelDRAW reads the whole file
Open CDR without CorelDRAW, to read	LibreOffice Draw	Mentioned only; does not save CDR

From an ownerless folder to a mapped archive.

Three steps. Each one only makes sense after the previous one has shown results on your team.

A proposal, not a promise

1 Today

Inventory

Octo shows what is in the archive, in which version and what is duplicated, without saving anything.

Files by internal version
Duplicates and backup copies
Files with personal data flagged

Benefit: knowing the archive's size before migrating

2 Next

Version policy

Each destination with its version written down, copies saved by macro and checked by the designer.

Original always intact
Log of each copy
Review PDF alongside

Benefit: fewer files sent back because they "won't open"

3 Later

Searchable archive

Copies in SVG and PNG for search and reuse, with a report of what was lost.

Text search in old pieces
Suspects reviewed by a person
Manifest linking copy and original

Benefit: old artwork found instead of redrawn

Confirmed in a source.

Each point below has a source published by Corel, Microsoft, the open-source project or the responsible body. Object and method names are checked in the Object Browser of the installed version. The sources are in the next section.

points with a published source, each with its reference shown alongside.

ConfirmedNo backward compatibility: "CorelDRAW files are not backwards compatible": a file from a newer version does not open in an older one; the way around it is "Save as" choosing the version.Source: coreldraw.com, How to open CDR files
Confirmed"Keep editable" can change the appearance: When saving to an earlier version, keeping it editable can change text, outlines, fills and transparencies; the default save version is set in the preferences.Source: product.corel.com, Save drawings
ConfirmedHow libcdr recognizes a CDR: RIFF + CDR + version character; WL for the old format; or a container with content/riffData.cdr or content/root.dat.Source: libcdr code, CDRDocument.cpp
ConfirmedThe Inkscape filter uses libcdr: Registers .cdr ("Corel DRAW 7-X4 files"), .cdt, .ccx and .cmx; libcdr is MPL 2.0, version 0.1.9 on Debian and Arch.Source: gitlab.com/inkscape, cdr-input.cpp; packages.debian.org; archlinux.org

What Octo does and what stays with you.

Octo prepares everything, but it does not sign. The document of record stays with whoever is accountable for it.

Octo prepares

Surveys, calculates, organizes and generates the documents: files, PDFs, variable data spreadsheets, proofs and reports.

Deliverable: material ready to check

Your team checks

The client or the art director checks what Octo delivered before approving. If something doesn't add up, it goes back to Octo with the correction.

Step: review by the approver

Who approves

Octo does not approve the artwork. Artwork carries no legal signature: approval of the artwork and the proof stays with the client or the art director.

Approval: client or art director

Sources.

Corel pages (format, help, 2026 press release, updates) and libcdr and Inkscape code and packages, consulted on Oct 31, 2026.

How to open CDR filesNo backward compatibility
Save drawingsVersion list, Keep editable
Export objects and pagesExport formats
CorelDRAW Graphics Suite 2026Press release of Mar 3, 2026
Version 2026 updatesv27.1 and v27.2
libcdr, CDRDocument.cppVersion detection
libcdr, NEWS0.1.0 to 0.1.9
libcdr-tools on Debiancdr2xhtml, cdr2raw
Inkscape, CDR filterExtensions and libcdr
Inkscape, command lineExport options

Your CDR archive, inventoried and checked.

The assessment starts with a read-only inventory of a folder that matters. You get the archive by version, the duplicates, what needs CorelDRAW and the questions only your team can answer, and you decide with that in hand.

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