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AiTechWorlds
AiTechWorlds
Insert, delete, search, and reverse a singly linked list with animated nodes, pointers, and multi-language code.
class Node:
def __init__(self, val): self.val = val; self.next = None
def reverse(head):
prev = None
while head:
nxt = head.next
head.next = prev
prev, head = head, nxt
return prevA singly linked list stores each element in a node with a value and a single pointer to the next node. Insertion at the head is O(1), but search and access by index are O(n) because nodes are not contiguous in memory.
| Insert at head | O(1) |
| Search / access | O(n) |
| Reverse | O(n) |
The Linked List Visualizer lets you insert, delete, search, and reverse a singly linked list and watch the nodes and pointers update. A singly linked list stores each value in a node that points to the next node, so insertion at the head is O(1) while search and index access are O(n). The reverse operation flips every next pointer in O(n).
Insert nodes
Type a value and click Head or Tail to insert at either end.
Delete or search
Type a value and click Delete to remove it, or Search to highlight its node.
Reverse the list
Click Reverse to flip every next pointer and reverse the order.
Read the code
See the reverse implementation in C++, Java, Python, or JavaScript and copy it.
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Last reviewed on June 14, 2026 by the AiTechWorlds Tools Team. All processing runs locally in your browser.