Billy Clarke's 12th goal of the season earned Crawley the points against fellow mid-table side Leyton Orient.
The decisive strike was full of quality as Clarke turned and curled a cracking effort past goalkeeper Jamie Jones from the edge of the area.
Mike Jones had the chance to double the visitors' lead, but his header from Nicky Adams' centre hit the crossbar.
The home side nearly stole a point late on but Dean Cox's close-range header was well saved by Paul Jones.
VIEWS FROM THE DRESSING ROOM
Leyton Orient boss Russell Slade told BBC London 94.9
"We were not the standard we wanted, we needed more urgency, and the goal was key.
"I don't think he will score another one of them that's for sure, and they have had just two shots on target all game.
"It was a bit flat, we recognised that and the players had to go and spark the crowd.
"But the goal against us hurt and it took time to recover. There were good pockets of football but we never hurt them despite 17 attempts on goal."
Crawley Town assistant manager Anthony Williams told BBC Sussex:
"The players have been excellent over the last two weeks. We've got a bit more of an in-depth squad now with players we can rely on.
"At 1-0 you're always open to counter attacks, but it's pleasing the fact that we kept a clean sheet.
"Billy Clarke is a fantastic player and he does create something out of nothing, it's nice having players like that in the team. "
Live Text Commentary
Full Time The referee brings the game to a close.90:00 +4:04
Direct effort from the free kick comes in from Dean Cox.90:00 +4:04 Booking
Booking Matthew Sparrow booked.90:00 +3:50
Unfair challenge on Leon McSweeney by Sergio Torres results in a free kick.90:00 +1:57
The official flags Mathieu Baudry offside. Free kick taken by Paul Jones.90:00 +1:12
Mat Sadler concedes a free kick for a foul on Moses Odubajo. Direct free kick taken by Dean Cox.90:00 +0:05 Booking
Booking Jamie Proctor receives a caution for time wasting.89:46
Handball by Jamie Proctor. Free kick taken by Jamie Jones.89:09
Sergio Torres takes a short corner.87:23 Substitution
Substitution Aiden O'Brien joins the action as a substitute, replacing Nicky Adams.87:23
Moses Odubajo concedes a free kick for a foul on Sergio Torres. Free kick taken by Paul Jones.87:05
Free kick awarded for an unfair challenge on Mathieu Baudry by Nicky Adams. Direct free kick taken by Mathieu Baudry.86:08
Foul by David Mooney on Joe Walsh, free kick awarded. Free kick taken by Paul Jones.84:59
Moses Odubajo has an effort at goal from just outside the box which goes wide of the left-hand post.84:19
Moses Odubajo crosses the ball, Joe Walsh manages to make a clearance.81:21 Substitution
Substitution Sergio Torres replaces Billy Clarke.79:14
Shaun Batt takes a shot. Joe Walsh gets a block in. Corner from the left by-line taken by Dean Cox, Scott Cuthbert takes a shot. Paul Jones makes a save. The ball is swung over by Billy Clarke.78:27 Substitution
Substitution Romain Vincelot leaves the field to be replaced by Jimmy Smith.78:05
Romain Vincelot produces a cross, David Mooney produces a right-footed shot from close in which goes wide of the right-hand upright.74:36
Lloyd James delivers the ball, comfortable save by Paul Jones.
Corner taken by Dean Cox from the right by-line, clearance by Mat Sadler.73:37
The ball is crossed by Shaun Batt, Mike Jones manages to make a clearance.72:08
Shaun Batt takes a shot. Save made by Paul Jones.71:45
Mustapha Dumbuya sends in a cross.69:46
The ball is delivered by David Mooney, Dean Cox takes a shot. Blocked by Matthew Sparrow. Inswinging corner taken by Dean Cox from the right by-line, Nathan Clarke takes a shot. Save by Paul Jones.68:15
Shaun Batt is flagged offside by the assistant referee. Indirect free kick taken by Paul Jones.66:22
Effort from outside the area by David Mooney goes wide right of the goal.65:56
Inswinging corner taken right-footed by Dean Cox from the right by-line, clearance made by Nicky Adams.64:20
Romain Vincelot fouled by Matthew Sparrow, the ref awards a free kick. Strike on goal comes in from Dean Cox from the free kick, blocked by Matthew Sparrow.63:10 Substitution
Substitution (Leyton Orient) makes a substitution, with Shaun Batt coming on for Charlie MacDonald.61:44
Mat Sadler takes the inswinging corner, Lloyd James manages to make a clearance.61:20
Nicky Adams takes a shot. Nathan Clarke gets a block in.59:14
Mustapha Dumbuya concedes a free kick for a foul on Dean Cox. Free kick taken by Romain Vincelot.58:31
Nicky Adams delivers the ball in from the corner, clearance made by Nathan Clarke.57:12
Effort from inside the six-yard box by Jamie Proctor goes wide left of the target.56:54
Dean Cox crosses the ball, Mark Connolly makes a clearance.56:09 Substitution
Substitution Lee Cook goes off and Moses Odubajo comes on.55:19
Free kick awarded for an unfair challenge on Mathieu Baudry by Jamie Proctor. Free kick taken by Mathieu Baudry.54:40
David Mooney is flagged offside by the assistant referee. Paul Jones takes the free kick.52:20
The ball is swung over by Leon McSweeney.50:47
Billy Clarke takes a shot. Save by Jamie Jones.49:37
Nicky Adams has an effort at goal from just outside the box which goes wide of the right-hand upright.45:01
The second half kicks off.45:00 +1:41 Half time
Half Time The referee calls an end to the first half.45:00 +1:10
David Mooney challenges Mat Sadler unfairly and gives away a free kick. Free kick taken by Joe Walsh.45:00 +0:09 Booking
Booking Lloyd James is cautioned.44:38
Lloyd James challenges Billy Clarke unfairly and gives away a free kick. Mustapha Dumbuya restarts play with the free kick.43:50
Nicky Adams gives away a free kick for an unfair challenge on Mathieu Baudry. Direct free kick taken by Jamie Jones.42:13
A cross is delivered by Lee Cook, Mark Connolly manages to make a clearance.40:14
Billy Clarke produces a right-footed shot from deep inside the six-yard box which goes wide of the right-hand upright.37:47
Billy Clarke takes a shot. Save made by Jamie Jones.37:09
Jamie Proctor is caught offside. Free kick taken by Jamie Jones.36:26
The referee gives a free kick against Billy Clarke for handball. Jamie Jones restarts play with the free kick.35:59
Corner taken by Mat Sadler played to the near post, clearance by Lloyd James.35:11
Nicky Adams crosses the ball, clearance made by Mathieu Baudry. Inswinging corner taken from the left by-line by Nicky Adams.33:32
Inswinging corner taken by Nicky Adams, clearance made by Scott Cuthbert. Nicky Adams decides to take the corner short.31:50
Mathieu Baudry takes a shot. Save by Paul Jones.31:06
Leon McSweeney fouled by Billy Clarke, the ref awards a free kick. Dean Cox restarts play with the free kick.29:38
Free kick awarded for an unfair challenge on Nicky Adams by Mathieu Baudry. The free kick is swung in right-footed by Nicky Adams, David Mooney manages to make a clearance.27:28
Charlie MacDonald takes a shot. Save made by Paul Jones. Inswinging corner taken from the right by-line by Lee Cook. Long range effort by Leon McSweeney goes over the bar.25:52
Free kick awarded for an unfair challenge on Mark Connolly by Nathan Clarke. Paul Jones takes the free kick.25:07
Jamie Proctor concedes a free kick for a foul on Mathieu Baudry. Lee Cook restarts play with the free kick.22:50
Billy Clarke gives away a free kick for an unfair challenge on Leon McSweeney. Free kick taken by Lloyd James.22:00
Handball decision goes against Charlie MacDonald. Direct free kick taken by Paul Jones.20:39
Nicky Adams delivers the ball, Mike Jones takes a shot.19:44
The ball is swung over by Leon McSweeney, comfortable save by Paul Jones.19:09
The ball is delivered by Leon McSweeney, clearance by Mark Connolly.16:14
Unfair challenge on Mathieu Baudry by Jamie Proctor results in a free kick. Direct free kick taken by Nathan Clarke.15:08
Nicky Adams produces a cross.14:16
The ball is crossed by Leon McSweeney, Close range effort by Mathieu Baudry goes wide of the right-hand upright.13:51
Mustapha Dumbuya gives away a free kick for an unfair challenge on Lee Cook. Free kick taken by Lloyd James.13:32
Unfair challenge on Nathan Clarke by Jamie Proctor results in a free kick. Free kick taken by Mathieu Baudry.13:09
The referee blows for offside against Charlie MacDonald. Paul Jones restarts play with the free kick.11:35
The ball is crossed by Dean Cox.10:22
Mat Sadler provided the assist for the goal.10:22 Goal scored
Goal! - Billy Clarke - Leyton O 0 - 1 Crawley Billy Clarke grabs a goal from inside the penalty area to the top right corner of the goal. Leyton Orient 0-1 Crawley Town.9:44
Free kick awarded for an unfair challenge on Mike Jones by Lloyd James. Nicky Adams restarts play with the free kick.5:31
The ball is swung over by Leon McSweeney, Joe Walsh makes a clearance.2:05
The ball is sent over by Charlie MacDonald, Mustapha Dumbuya makes a clearance.1:36
Corner taken right-footed by Nicky Adams from the left by-line, save by Jamie Jones.0:00
The referee starts the match.
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