Did Judas repent?

³² Two others also, who were criminals, were being led away to be put to death with Him. (Luke 23:32)

Last words of one of the criminals,

⁴¹ And we indeed are suffering justly, for we are receiving what we deserve for our deeds; but this man has done nothing wrong.” ⁴² And he was saying, “Jesus, remember me when You come in Your kingdom!” (Luke 23:41)

Meanwhile,

³ Then when Judas, who had betrayed Him, saw that He had been condemned, he felt remorse and returned the thirty pieces of silver to the chief priests and elders, ⁴ saying, “I have sinned by betraying innocent blood.” But they said, “What is that to us? See to that yourself!” ⁵ And he threw the pieces of silver into the temple sanctuary and departed; and he went away and hanged himself. (Matthew 27:3-5)

And regarding forgiveness of others,

¹³ But Ananias answered, “Lord, I have heard from many about this man, how much harm he did to Your saints at Jerusalem; (Acts 9:13)

The answers Jesus gave,

⁴³ And He said to him, “Truly I say to you, today you shall be with Me in Paradise.” (Luke 23:43)

¹⁵ But the Lord said to him, “Go, for he is a chosen instrument of Mine, (Acts 9:15a)

I believe if you cannot comprehend heaven with Judas, you have unforgiveness towards a brother or sister that you believe is unforgivable.

²⁰ If someone says, “I love God,” and hates his brother, he is a liar; for the one who does not love his brother whom he has seen, cannot love God whom he has not seen. (1 John 4:20)

References

Luke 23:32

Luke 23:41

Matthew 27:3-5

Acts 9:13

Luke 23:43

Acts 9:15a

1 John 4:20