The problem
Why old military letters are so hard to read
Wartime letters were written under conditions that make them uniquely difficult to read today. Soldiers wrote in pencil when ink wasn't available, on whatever paper they could find, often in haste. V-mail – the microfilmed postal system used by American forces – reduced letters to a fraction of their original size, making already small handwriting even harder to decipher. Decades of storage have added fading, foxing, and fold damage on top of the original difficulties. These letters may contain descriptions of difficult experiences – but they are also a direct, personal record worth preserving.
Pencil on rough paper – field conditions meant graphite that has faded over 80 years
V-mail microfilm reduction – letters were photographed, shrunk, and reprinted at roughly 4 by 5 inches
Hasty, irregular handwriting written under stress or poor lighting
Censorship marks – blacked-out passages, stamps, and resealed envelopes obscure parts of the text
Water damage and mould from decades of storage in attics, basements, or footlockers
The solution
AI trained on faded pencil, old ink, and damaged documents
Transkribus uses handwritten text recognition (HTR) – AI trained on millions of historical handwriting samples, including low-contrast pencil, faded ink, and degraded paper. General-purpose AI tools handle modern handwriting reasonably well, but they struggle with the combination of old scripts, physical damage, and reduced V-mail that makes wartime letters so challenging. Upload a photo of your letter, and the AI returns readable text with confidence scores on every line.
Handles faded pencil and low-contrast documents that defeat standard OCR
Works from a smartphone photo – no scanner needed
Confidence scores on every line so you know which words to double-check
Process multiple letters in batch – upload a folder of scans and transcribe them all at once
Export as plain text, PDF, or structured XML
Understanding V-mail
V-Mail, APO numbers, and censorship marks – what to expect
V-mail (Victory Mail) was a microfilm-based postal system designed to save cargo space on transport ships. Soldiers wrote on a standard one-page form. The letter was photographed, the film shipped overseas, and a reduced print – roughly 4 by 5 inches – delivered to the recipient. The original was destroyed. If your letter looks unusually small and dense, it's probably a V-mail print. APO (Army Post Office) and FPO (Fleet Post Office) numbers replaced real location names for security reasons. These numbers can help identify where the writer was stationed – the National Archives (NARA) and the National WWII Museum maintain reference lists that match APO numbers to locations.
V-mail prints are roughly one quarter the size of the original – expect small, compressed handwriting
APO and FPO numbers are location codes, not unit designations – cross-reference with NARA records to identify the theatre of operations
Censorship stamps ('Passed by Censor', 'Examined by') indicate the letter was reviewed before delivery – blacked-out passages are intentional, not damage
Opened-and-resealed envelopes with official tape are a sign of censorship, not tampering
Letter formats
Postcards, field letters, Red Cross messages – formats you may find
Not all wartime correspondence came as standard letters. Soldiers also sent postcards (often pre-printed military designs), field-service postcards with pre-printed phrases to circle, and Red Cross message forms with strict word limits. Each format has different reading challenges. Pencil letters from the field tend to be the hardest – the graphite fades fastest, and the handwriting is often the most hurried. Ink letters, typically written from hospitals or rear areas, tend to be more legible.
Standard letters – handwritten on personal or military-issue stationery, varying wildly in legibility
V-mail forms – standardised one-page format, microfilmed and reduced
Field-service postcards – pre-printed phrases with some handwritten additions
Red Cross messages – limited to 25 words, often the only communication channel for prisoners of war
Pencil vs. ink – pencil usually means field conditions and tends to fade more over time
Frequently asked questions
Ready to transcribe your WWII letters?
Create a free account and start reading your family's wartime letters today. 50 free credits every month – no credit card required.
50 free credits every month – No credit card required
200M+Pages processed
500K+Users worldwide
300+Public AI models