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Modernize COBOL in Minutes

Name: COBOL AI
Author: PlatPhorm News Network

COBOL — the "self-documenting" programming language — still powers critical legacy systems. COBOL AI gives you public deterministic analysis, risk scoring, cost estimates, documentation, COBOL 2023 suggestions, and honest degraded model-assisted translation scaffolding.

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bank-balance.cbl

Legacy

1IDENTIFICATION DIVISION.

2PROGRAM-ID. BANK-BALANCE.

3DATA DIVISION.

401 WS-BALANCE PIC 9(7)V99.

501 WS-STATUS PIC X(1).

6 88 OVERDRAWN VALUE 'Y'.

7PROCEDURE DIVISION.

8 COMPUTE WS-BALANCE = WS-BALANCE + AMT

9 IF WS-BALANCE < 0

10 SET OVERDRAWN TO TRUE

11 PERFORM OVERDRAFT-FEE

12 END-IF.

Upgrading to COBOL 2023ISO/IEC 1989:2023

1*> COBOL 2023 (ISO/IEC 1989:2023)

2identification division.

3program-id. bank-balance.

4data division.

501 ws-balance float-decimal-34.

601 ws-overdrawn boolean value false.

7procedure division.

8 try

9 compute ws-balance = ws-balance + amt

10 if ws-balance < 0

11 set ws-overdrawn to true

12 raise overdraft-exception

13 catch overdraft-exception

14 perform apply-overdraft-fee

15 end-try.

Industry-scaleCOBOL footprint

CriticalFinancial systems

DeterministicAnalyzer output

Public-safePhase 1 access

Enterprise-Grade Modernization

Everything you need to take legacy COBOL from mainframe to modern stack, with confidence.

AI-Powered Translation

Backend model-assisted translation is scaffolded for Java, Python, TypeScript, C#, and COBOL 2023. If no provider is configured, COBOL AI returns an explicit degraded state instead of fake translated code.

Compliance Testing

Deterministic checks for Y2K patterns, data type risks, file I/O, dependencies, and control-flow risk. Compliance output is evidence for review, not certification.

Deep Static Analysis

Instant complexity scoring, data dictionary extraction, risk assessment, and cost estimation. Zero AI tokens -- runs on our static engine.

Self-Documenting Analysis

COBOL is the "self-documenting" language. The Phase 1 documentation generator derives markdown, data dictionaries, and control-flow summaries from actual source structure.

Kanban Pipeline Tracking

Plan complex modernizations with a public local Kanban preview. External board mutation is scaffolded as a future protected PLATPHORM_API_KEY action.

Live Results, In Minutes

Paste COBOL and get deterministic analysis, compliance, docs, cost, data dictionary, ASCII, and COBOL 2023 suggestions immediately. Public-safe access remains open.

Try It Right Now

Paste COBOL, choose a mode, and run public-safe deterministic analysis. Model translation is labeled degraded unless a backend provider is configured. No signup required.

Public-safeEncrypted browser sessionModel/Kanban future protected

input.cbl

COBOL

IDENTIFICATION DIVISION.
       PROGRAM-ID. BANK-BALANCE.
       AUTHOR. LEGACY-SYSTEMS.
      *
       ENVIRONMENT DIVISION.
       INPUT-OUTPUT SECTION.
       FILE-CONTROL.
           SELECT ACCOUNT-FILE ASSIGN TO 'ACCTFILE'
               ORGANIZATION IS INDEXED
               ACCESS MODE IS DYNAMIC
               RECORD KEY IS ACCT-NUMBER
               FILE STATUS IS WS-FILE-STATUS.
      *
       DATA DIVISION.
       FILE SECTION.
       FD ACCOUNT-FILE.
       01 ACCOUNT-RECORD.
           05 ACCT-NUMBER        PIC 9(10).
           05 ACCT-NAME          PIC X(30).
           05 ACCT-BALANCE       PIC S9(9)V99.
           05 ACCT-TYPE          PIC X(1).
               88 CHECKING       VALUE 'C'.
               88 SAVINGS        VALUE 'S'.
           05 ACCT-STATUS        PIC X(1).
               88 ACTIVE         VALUE 'A'.
               88 CLOSED         VALUE 'X'.
      *
       WORKING-STORAGE SECTION.
       01 WS-FILE-STATUS         PIC XX.
       01 WS-TRANSACTION.
           05 WS-TRANS-TYPE      PIC X(1).
               88 DEPOSIT        VALUE 'D'.
               88 WITHDRAWAL     VALUE 'W'.
           05 WS-TRANS-AMOUNT    PIC S9(9)V99.
       01 WS-NEW-BALANCE         PIC S9(9)V99.
       01 WS-MIN-BALANCE         PIC S9(9)V99 VALUE 25.00.
       01 WS-OVERDRAFT-FEE       PIC S9(5)V99 VALUE 35.00.
      *
       PROCEDURE DIVISION.
       MAIN-LOGIC.
           OPEN I-O ACCOUNT-FILE
           PERFORM PROCESS-TRANSACTION
           CLOSE ACCOUNT-FILE
           STOP RUN.
      *
       PROCESS-TRANSACTION.
           READ ACCOUNT-FILE
               INVALID KEY
                   DISPLAY 'ACCOUNT NOT FOUND: ' ACCT-NUMBER
                   GO TO PROCESS-TRANSACTION-EXIT
           END-READ
      *
           IF NOT ACTIVE
               DISPLAY 'ACCOUNT CLOSED: ' ACCT-NUMBER
               GO TO PROCESS-TRANSACTION-EXIT
           END-IF
      *
           EVALUATE TRUE
               WHEN DEPOSIT
                   ADD WS-TRANS-AMOUNT TO ACCT-BALANCE
                       GIVING WS-NEW-BALANCE
                   MOVE WS-NEW-BALANCE TO ACCT-BALANCE
               WHEN WITHDRAWAL
                   SUBTRACT WS-TRANS-AMOUNT FROM ACCT-BALANCE
                       GIVING WS-NEW-BALANCE
                   IF WS-NEW-BALANCE < WS-MIN-BALANCE
                       SUBTRACT WS-OVERDRAFT-FEE FROM WS-NEW-BALANCE
                       DISPLAY 'OVERDRAFT FEE APPLIED'
                   END-IF
                   MOVE WS-NEW-BALANCE TO ACCT-BALANCE
           END-EVALUATE
      *
           REWRITE ACCOUNT-RECORD
               INVALID KEY
                   DISPLAY 'UPDATE FAILED: ' ACCT-NUMBER
           END-REWRITE.
      *
       PROCESS-TRANSACTION-EXIT.
           EXIT.

output.ts

Click Modernize to translate your COBOL code

Transparent, Cost-Efficient Pricing

Know exactly what modernization costs before you commit. Our static analyzer gives you an instant estimate -- zero AI tokens consumed.

TierSizeCostExample

Trivial< 50 lines$0.02/lineHello World, date utilities

Simple50-200 lines$0.05/lineReports, batch scripts

Moderate200-1K lines$0.12/lineTransaction processing

Complex1K-5K lines$0.25/lineCore banking modules

Enterprise5K+ lines$0.40/lineFull mainframe systems

Estimates based on non-blank code lines. Use the Analyze tab in the playground for a precise quote on your specific program. Enterprise volume discounts available.

How It Works

Three steps from legacy COBOL to a reviewed modernization plan.

Paste Your COBOL

Drop in COBOL source or choose from the bundled public samples. Input is bounded and not persisted server-side by default.

Analyze & Estimate

Our static engine scores complexity, detects risks, and estimates cost instantly -- before burning a single AI token. Plan with confidence.

Modernize & Track

Generate deterministic docs, compliance findings, COBOL 2023 suggestions, and a Kanban preview. Model translation is used only when backend configuration exists.

Built for Mission-Critical Systems

Designed for public-safe inspection of high-risk legacy modernization work.

Secure by Design

AES-GCM encrypted sessions, no server persistence, no training on your code. Your IP stays yours.

Session Isolation

Cryptographic session IDs, 24-hour TTL, PBKDF2 key derivation. Zero cross-session leakage.

Enterprise Pipeline

Kanban preview workflow: backlog through done. External mutation is future protected and never faked.

Open Standards

OpenAPI, RSS, sitemap, MCP, LLM discovery, and an i18n scaffold. Non-English copy needs a Phase 1 accuracy pass before re-enabling.

Why Teams Trust COBOL AI

Business logic preservation requires human review

Static analysis before AI -- no surprise costs

Instant complexity scoring (0-100)

Y2K pattern detection built in

Kanban preview for multi-phase projects

PlatPhorm News Network route standard

MCP-compatible tool endpoints

Transparent per-line pricing