MD5 Hash Cracker
Note: Technically there is no limit to the actual number of hashes you can submit at one time.
Although, each hash is processed individually by the client so your browser is the actual limitation.
From personal experience anything more than 1,000 hashes caused my browser to come screeching to a halt.
Your mileage will vary.
The space character is replaced with "[space]". This better identifies spaces at the beginning
and end of passwords. I've noticed a large number of online crackers do not properly do this.