Aliens cryptograms for kids
Extraterrestrial life and UFO adventures. Every sheet is generated and checked before it reaches the page, and each one prints with its answer key.
3 cryptograms on this page
Every level is below with its answer key. Print the one you want; the others stay off the paper.
Aliens cryptogram: Easy
Ages 6-8
Cryptogram - Answer Key
PORTAL · SIGNAL · GALAXY · MARTIAN · ORBIT · LASER · LANDING · MORPH · CREATURE · PROBE
Aliens cryptogram: Medium
Ages 8-10
Cryptogram - Answer Key
MORPH · LASER · INVADE · ORBIT · MARTIAN · ABDUCT · GALAXY · SAUCER · PLANET · PROBE
Aliens cryptogram: Hard
Ages 10-12
Cryptogram - Answer Key
SAUCER · BEAM · CREATURE · COSMIC · PLANET · ORBIT · PORTAL · ANTENNA · GALAXY · ABDUCT
The whole aliens pack
All 5 activities on this theme in one printable file: maze, word search, crossword, word scramble and bingo.
More aliens puzzles
The same words, four other ways to play.
More space cryptograms
About aliens cryptograms
Ready to be a codebreaker? Each aliens word below is written in a letter-swap cipher, and one starter letter is given. Figure out which letter stands for which, then decode all the aliens words. Free to print, with an answer key included.
Cryptograms are a sneaky-fun way to build spelling, letter recognition, and logical reasoning. Kids use pattern-spotting and process of elimination to crack the code, and the aliens theme keeps them motivated to finish. Because the whole puzzle uses one consistent cipher, solving it rewards careful, methodical thinking - the same skill that helps with reading and math.
Start with the hint letter. Wherever that coded letter appears, write the real letter - the code is the same for every word. Use the letters you have decoded, plus the aliens theme, to guess the rest. Check each finished word against the answer key.
Common questions
How does a aliens cryptogram work?+
Each letter of the alphabet is swapped for a different letter, and the same code is used for every aliens word on the page. You crack the code - figuring out which letter stands for which - and write the decoded aliens words on the blank lines.
How many hints does the Medium aliens cryptogram give?+
The Medium level gives 1 starter letter. The hints show which real letter a coded letter stands for, to get you started.
What age is the Medium aliens cryptogram for?+
The Medium level suits ages 8-10. Cryptograms involve reading and spelling, so they work best for kids who can already read simple words; the hint count is what makes each level easier or harder.
Are these aliens cryptograms free to print?+
Yes, completely free with no signup. Print these aliens cryptogram puzzles as many times as you like for home or the classroom. An answer key is included on a separate page.